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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 all elements rule or all limitations rule (often written with a hyphen after "all") is a legal test used in US patent law to determine whether a given reference shows that a patent claim [1] lacks the novelty required to be valid. The rule is also applicable to an obviousness analysis. [2]
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 (usually, 20 years) from profiting from a patented technology without the consent of the patent ...
In US patent law, non-obviousness is one of the requirements that an invention must meet to qualify for patentability, codified as a part of Patent Act of 1952 as 35 U.S.C. §103. An invention is not obvious if a " person having ordinary skill in the art " (PHOSITA) would not know how to solve the problem at which the invention is directed by ...
The purpose of the inventive step, or non-obviousness, requirement is to avoid granting patents for inventions which only follow from "normal product design and development", to achieve a proper balance between the incentive provided by the patent system, namely encouraging innovation, and its social cost, namely conferring temporary monopolies. [4]
§ 121 of the Patent Act of 1952 was the first time, when the US Congress addressed the problem of double patenting. Prior to 1952, even when a patent examiner required splitting a patent application into several divisionals, the resulting divisionals were used against each other in courts as grounds for double patenting invalidation. This was ...
Prior art (also known as state of the art [1] or background art [2]) 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.
Hotchkiss v. Greenwood, 52 U.S. (11 How.) 248 (1851), was a United States Supreme Court decision credited with introducing into United States patent law the concept of non-obviousness as a patentability requirement, [1] as well as stating the applicable legal standard for determining its presence or absence in a claimed invention.