Are claims all that matter?

[engineerscansel]

Setting the stage: We're reviewing a patent and the general patent, background, examples and description talk only about a certain manufacturing process, casting, but the claims don't mention the manufacturing route at all, they just talk about the product, say a fan blade.

My question is if we want to do this fan blade via a forging process, which clearly wasn't the intent of the patent, are we still in trouble since the claims don't specify the manufacturing process.

I guess the questions boils down to "are claims all that matter in a patent?"

Thanks in advance!

[divgradcurl]

Originally Posted by engineerscansel

Setting the stage: We're reviewing a patent and the general patent, background, examples and description talk only about a certain manufacturing process, casting, but the claims don't mention the manufacturing route at all, they just talk about the product, say a fan blade.

My question is if we want to do this fan blade via a forging process, which clearly wasn't the intent of the patent, are we still in trouble since the claims don't specify the manufacturing process.

I guess the questions boils down to "are claims all that matter in a patent?"

Thanks in advance!

Yes, the claims are all that matter. The claims delineate the scope of the patent monopoly. That said, the interpretation of the claims is going to be dependent on the "intrinsic record" -- the written description of the patent and its prosecution history -- along with (to a lesser extent) the "extrinsic record" -- usually what one "of ordinary skill in the art" would know the claims to mean.

But as a general rule, the scope of a patent's claims are not limited to the embodiments described in the specification (written description) except in a few specific circumstances. It is rare that a limitation can be "read in" to a claim based on the specification. In your example, if the claims cover the design and/or functionality of a blade, and say nothing about the manufacturing process, then the manufacturing process -- in most cases -- simply is irrelevant, and you won't be able to get around the patent simply by using a different manufacturing process than what appears in the specification.

The main exceptions are if the claim is written in "means plus function" format (under 35 USC 112 paragraph 6), in which case the claim may well be limited to the examples in the specification. Another example is when the specification not only describes a certain thing -- a casting process, in your example -- but actually disparages or "teaches away" from another process -- such as a forging process -- then it may be possible to limit the patent to those items manufactured using a casting process. But these are limited examples, and the general rule is to NOT read limitations into the claims.

The "intent" of the patent -- or the inventor -- is almost entirely irrelevant to the question of claim scope.