Patents and when is a Patent Obvious

A patent can be revoked if it is obvious. Section 3 of the Patents Act 1977 provides that an invention shall be taken to involve an inventive step if it is not obvious to a person skilled in the art.

Section 14(3) of the Patents Act provides:

“The specification of an application shall disclose the invention in a manner which is clear enough and complete enough for the invention to be performed by a person skilled in the art”.

Section 72(1) of the Patents Act provides for the revocation of a patent on grounds which include:

“(c) the specification of the patent does not disclose the invention clearly enough and completely enough for it to be performed by a person skilled in the art”.

Whether or nor a patent was obvious was set out in Lord Diplock’s Judgement of Catnic Components Ltd v Hill & Smith Ltd [1982] RPC 183

“persons with practical knowledge and experience of the kind of work in which the invention was intended to be used”.

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