What standards are applied to determine if an invention is patentable?

There are three standards: utility, novelty, and non-obviousness. Utility requires that the invention has a useful function (general utility) and that it actually performs that function (specific utility). For example, a perpetual motion machine is not patentable because it cannot actually perform its supposed function. Novelty, as defined in 35 U.S. Code §102, requires: (a) that the invention was not known, used or patented by others before the applicant invented it, and (b) that the invention was not in public use or on sale in the U.S. and was not patented or described in a printed publication in any country more than one year prior to the date of the application for patent in the U.S. Inventions that were known, used, sold or patented before the applicant’s invention are referred to as the “prior art”. Non-obviousness, as defined in 35 U.S. Code §103, requires that the applicant’s invention be sufficiently different form the prior art that a person of ordinary skill in

the field would not be able to derive the invention from the prior art. In other words, if someone of ordinary skill in the field could have come up with the same invention based on the prior art, then the invention is obvious and is not patentable.

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