How can I determine if a trademark or trade name in a patent claim is indefinite?

To determine if a trademark or trade name in a patent claim is indefinite, consider the following factors:

• Whether the trademark or trade name is used to identify or describe a particular material or product.
• If it’s used as a limitation to identify or describe a particular material or product, it may render the claim indefinite.
• The scope of the trademark or trade name may change over time, leading to uncertainty in claim interpretation.

As stated in MPEP 2173.05(u):

“If the trademark or trade name is used in a claim as a limitation to identify or describe a particular material or product, the claim does not comply with the requirements of the 35 U.S.C. 112(b) or pre-AIA 35 U.S.C. 112, second paragraph.“

Examiners should carefully evaluate the use of trademarks or trade names in claims to ensure clarity and definiteness.

To learn more:

• trademark
• trade name
• indefiniteness
• patent claims
• 35 U.S.C. 112(b)