What are the typical circumstances where an adequate written description issue arises?

According to MPEP 2163.03, there are six typical circumstances where an adequate written description issue can arise:

1. Amendment affecting a claim
2. Reliance on filing date of parent application under 35 U.S.C. 120
3. Reliance on priority under 35 U.S.C. 119
4. Support for a claim corresponding to a count in an interference
5. Original claim not sufficiently described
6. Indefiniteness rejection of a means- (or step-) plus-function limitation

These circumstances typically involve determining whether the subject matter of a claim is supported in an application as filed.

To learn more:

• written description
• patent application
• claim amendments
• priority claims
• interference proceedings