How does the USPTO define ‘long-felt need’ in patent examination?

The USPTO defines ‘long-felt need’ as a persistent problem or demand in an industry that has not been solved for an extended period. According to MPEP 716.04, ‘The failure to solve a long-felt need may be due to factors such as lack of interest or lack of appreciation of an invention’s potential or marketability.’ To establish long-felt need, an applicant must demonstrate:

• The need was persistent and recognized by those of ordinary skill in the art.
• The need was not solved by another before the invention.
• The invention effectively solves the need.

To learn more:

• long-felt need
• patent examination
• USPTO criteria