How does the disclosure of alternatives affect a prior art suggestion?
This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.
The disclosure of desirable alternatives in prior art does not necessarily negate a suggestion for modifying the prior art to arrive at the claimed invention. As stated in MPEP 2143.01, “the prior art’s mere disclosure of more than one alternative does not constitute a teaching away from any of these alternatives because such disclosure does not criticize, discredit, or otherwise discourage the solution claimed.” This principle was established in the case of In re Fulton, where the court affirmed that the prior art as a whole can suggest the desirability of a combination, even if it’s not the most preferred or desirable option.