Patent Criteria Family
Claim Support and Possession
Examines whether claims are supported by the specification and whether the applicant possessed the full scope of the invention at filing. Includes written description and claim breadth analysis.
Overview
This family focuses on whether the application supports what the claims say the inventor invented. This becomes especially important when claims are broad, functionally framed, or aimed at classes of embodiments extending beyond the disclosed examples.
Topic 3.1: Written Description
The written description materials are U.S.-focused and deal with whether the application shows that the inventor was in possession of the claimed invention. The source text addresses description of the invention itself, possession, species support, genus and subgenus treatment, and examples of success or failure under the standard.
The level of detail required to satisfy the written description requirement varies depending on the nature and scope of the claims. No bright-line rules govern the number of species that must be disclosed to describe a genus claim — this number necessarily changes with each invention and with progress in a field. Ariad Pharms., Inc. v. Eli Lilly & Company, 598 F.3d 1336 (Federal Circuit, 2010) (en banc).
📥 Claim Support and Possession — PDF
Licensed under Creative Commons Attribution-ShareAlike 4.0 International (2026 by QuickSilver IP)
Why This Family Matters
This family becomes especially important when claims are broad, functionally framed, or aimed at classes of embodiments extending beyond the disclosed examples.
Have Questions About Your IP?
These resources support general understanding of IP strategy. For guidance specific to your situation, start a conversation.
Get in Touch