0

I have noticed that examiners in the US and Canada usually complain about stating preferred values of a broader range in a claim. What would be the best way to amend such claim to comply with clarity?

Improve this question

1 Answer 1

Reset to default
1

There is nothing wrong with using the word “preferably” in relation to numerical values in the specification.

However a claim needs to define a boundary between what it covers and what it does not cover so there is no place for that word in any claim. Does a product infringe that doesn’t meet the “preferred” values?

You can use “about” and “an effective amount”.

You can have an independent claim with the broader values and a depended claim with narrower values. Each clear but one a subset of the other.

Improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .