Doctrine of inherency

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In United States patent law, the doctrine of inherency holds that, under certain circumstances, prior art may be relied upon not only for what it expressly teaches, but also for what is inherent therein, i.e., what necessarily flows from the express teachings. [1] For a patent claim to be valid, its subject-matter must be novel and non-obvious. The claim is anticipated (i.e. will fail because its subject-matter is not novel) if a single prior art reference, either expressly or inherently, discloses every feature of the claimed invention. The concept of inherency is predicated on the idea that a claim should not pass the test of anticipation merely because a feature of it is undisclosed or unrecognized in the prior art reference. A prior art source may thus still anticipate if an apparently missing element of the claim is inherent in that prior art source.

Procedurally, to rely on the doctrine of inherency, one must provide a basis in fact and/or technical reasoning supporting a determination that an allegedly inherent characteristic necessarily would be present if the teachings of the prior art were followed, even if the inherent feature would not have been recognized.

The fact that a certain result or characteristic may occur or be present in the prior art is not alone sufficient to establish inherency of that result or characteristic. To establish inherency, the evidence must make clear that the missing matter is necessarily present in the prior art reference. Inherency may not be established by probabilities or possibilities.

Once the United States Patent and Trademark Office (USPTO) establishes that a product referenced in prior art appears to be substantially identical, the burden shifts to the applicant to show a non-obvious difference.

The doctrine of inherency is typically invoked when an inventor tries to obtain a product patent for a product that had been unintentionally invented earlier ("accidental anticipation").

The United States Supreme Court held in Tilghman v. Proctor that where the first, accidental producer was not aware of the product and did not attempt to produce it, the first production did not bar a patent on the subsequent "invention" of the product. 102 U.S. 707 (1880).

The use of the doctrine of inherency in a determination of obviousness is more complicated because "[t]hat which may be inherent is not necessarily known and that which is unknown cannot be obvious." [2]

A patent applicant may use the doctrine of inherency to respond to a rejection for lack of an adequate written description by showing that the patent application inherently includes the disclosure that is allegedly lacking. [3]

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Prior art is a concept in patent law used to determine the patentability of an invention, in particular whether an invention meets the novelty and the inventive step or non-obviousness criteria for patentability. In most systems of patent law, prior art is generally defined as anything that is made available, or disclosed, to the public that might be relevant to a patent's claim before the effective filing date of a patent application for an invention. However, notable differences exist in how prior art is specifically defined under different national, regional, and international patent systems.

In a patent or patent application, the claims define, in technical terms, the extent, i.e. the scope, of the protection conferred by a patent, or the protection sought in a patent application. In other words, the purpose of the claims is to define which subject-matter is protected by the patent. This is termed as the "notice function" of a patent claim—to warn others of what they must not do if they are to avoid infringement liability. The claims are of the utmost importance both during prosecution and litigation alike.

A person having ordinary skill in the art, a person of (ordinary) skill in the art, a person skilled in the art, a skilled addressee or simply a skilled person is a legal fiction found in many patent laws throughout the world. This fictional person is considered to have the normal skills and knowledge in a particular technical field, without being a genius. He or she mainly serves as a reference for determining, or at least evaluating, whether an invention is non-obvious or not, or involves an inventive step or not. If it would have been obvious for this fictional person to come up with the invention while starting from the prior art, then the particular invention is considered not patentable.

Novelty is a requirement for a patent claim to be patentable. An invention is not new and therefore not patentable if it was known to the public before the filing date of the patent application, or before its date of priority if the applicant claims priority of an earlier patent application. The purpose of the novelty requirement is to prevent prior art from being patented again.

Within the context of a national or multilateral body of law, an invention is patentable if it meets the relevant legal conditions to be granted a patent. By extension, patentability also refers to the substantive conditions that must be met for a patent to be held valid.

The inventive step and non-obviousness reflect a general patentability requirement present in most patent laws, according to which an invention should be sufficiently inventive—i.e., non-obvious—in order to be patented. In other words, "[the] nonobviousness principle asks whether the invention is an adequate distance beyond or above the state of the art".

In United States patent law, the reduction to practice is the step in the formation of an invention beyond the conception thereof. Reduction to practice may be either actual or constructive. The date of reduction to practice was critical to the determination of priority between inventors in an interference proceeding under the discontinued first-to-invent system as well as for swearing behind a reference under that system.

Patent prosecution describes the interaction between applicants and their representatives, and a patent office with regard to a patent, or an application for a patent. Broadly, patent prosecution can be split into pre-grant prosecution, which involves arguing before, and sometimes negotiation with, a patent office for the grant of a patent, and post-grant prosecution, which involves issues such as post-grant amendment and opposition.

Sufficiency of disclosure or enablement is a patent law requirement that a patent application disclose a claimed invention in sufficient detail so that the person skilled in the art could carry out that claimed invention. The requirement is fundamental to patent law: a monopoly is granted for a given period of time in exchange for a disclosure to the public how to make or practice the invention.

Under United States law, a patent is a right granted to the inventor of a (1) process, machine, article of manufacture, or composition of matter, (2) that is new, useful, and non-obvious. A patent is the right to exclude others, for a limited time from profiting of a patented technology without the consent of the patent-holder. Specifically, it is the right to exclude others from: making, using, selling, offering for sale, importing, inducing others to infringe, applying for an FDA approval, and/or offering a product specially adapted for practice of the patent.

This is a list of legal terms relating to patents. A patent is not a right to practice or use the invention, but a territorial right to exclude others from commercially exploiting the invention, granted to an inventor or his successor in rights in exchange to a public disclosure of the invention.

An information disclosure statement refers to a submission of relevant background art or information to the United States Patent and Trademark Office (USPTO) by an applicant for a patent during the patent prosecution process. There is a duty on all patent applicants to disclose relevant art or background information that the applicant is aware of and that may be relevant to the patentability of the applicant's invention, as established by the United States Code title 35 and related sections of 37 CFR and the Manual of Patent Examining Procedure (MPEP). If a patent applicant, with deceptive intent for art known to the applicant, fails to submit material prior art to the USPTO, then any patent that later issues from the patent application may be declared unenforceable because of inequitable conduct. Furthermore, the duty to submit such relevant information to the USPTO lies not only on the applicant or inventor, but also on any patent attorney or other legal staff employed by the applicant.

Title 35 of the United States Code is a title of United States Code regarding patent law. The sections of Title 35 govern all aspects of patent law in the United States. There are currently 37 chapters, which include 376 sections, in Title 35.

Canadian patent law

Canadian patent law is the legal system regulating the granting of patents for inventions within Canada, and the enforcement of these rights in Canada.

The all elements rule or all limitations rule is a legal test used in US patent law to determine whether a given reference shows that a patent claim lacks the novelty required to be valid. The rule is also applicable to an obviousness analysis. Under the rule, a single reference or the combination of references relied upon, plus the ordinary knowledge of persons skilled in the art, must provide each claimed element. For anticipation, and under certain circumstances for obviousness, the doctrine of inherency may be relied on to meet this test.

Novelty and non-obviousness in Canadian patent law

For a patent to be valid in Canada, the invention claimed therein needs to be new and inventive. In patent law, these requirements are known as novelty and non-obviousness. A patent cannot in theory be granted for an invention without meeting these basic requirements or at least, if a patent which does not meet these requirements is granted, it cannot later be maintained. These requirements are borne out of a combination of statute and case law.

Defences and remedies in Canadian patent law

A patent holder in Canada has the exclusive right, privilege and liberty to making, constructing, using and selling the invention for the term of the patent, from the time the patent is granted. Any person who does any of these acts in relation to an invention without permission of the patent owner is liable for patent infringement.

"Non-obviousness" is the term used in US patent law to describe one of the requirements that an invention must meet to qualify for patentability, codified in 35 U.S.C. §103. One of the main requirements of patentability in the U.S. is that the invention being patented is not obvious, meaning that a "person having ordinary skill in the art" (PHOSITA) would not know how to solve the problem at which the invention is directed by using exactly the same mechanism. Since the PHOSITA standard turned to be too ambiguous in practice, the U.S. Supreme Court provided later two more useful approaches which currently control the practical analysis of non-obviousness by patent examiners and courts: Graham et al. v. John Deere Co. of Kansas City et al., 383 U.S. 1 (1966) gives guidelines of what is "non-obvious", and KSR v. Teleflex (2006) gives guidelines of what is "obvious".

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