Written Description Support for Claimed Range Requires More than Broad Disclosure

federal circuitGen. Hosp. Corp. v. Sienna Biopharmaceuticals, Inc., No. 2017-1012, 2018  (Fed. Cir. May 4, 2018) (Before Moore, Reyna, and Taranto, J.) (Opinion for the court, Moore, J.)

Appellant General Hospital Corp. (“GHC”) appealed the Board’s dismissal of an interference because the claims of its involved patent application lacked sufficient written description. GHC also appealed the Board’s denial of its contingent motion to add a new claim.

The application was directed to methods of removing hair using nanoparticles to damage hair follicles. The disclosure described formulations by reference to optical density (OD), whereas, the claims in the interference referred to concentration in particles per ml. The parties disputed the proper coefficient to convert OD to concentration. The Board accepted the coefficient offered by Sienna’s expert. Using that coefficient, the Board found that no OD values disclosed in the application, when converted, were within the claimed concentration range. Therefore, the application did not provide written description support for the disputed claims.

On appeal, the Federal Circuit agreed with the Board’s findings that none of the disclosed values in the patent-application-in-suit fell within the claimed ranges. The Court stated that “[t]he disclosure of a broad range of values does not by itself provide written description support for a particular value within that range.” In this case, “concentrations from less than 1 x 1011 particles per ml to some unidentified maximum, does not provide written description support for the claimed concentration of ‘about 6.6 x 1011 particles per ml,’ nor does the disclosure of particular discrete values within that range, none of which are the claimed value.”

The Court reiterated its prior precedent that the disclosed range must particularly identify or single out the claimed range. See Eiselstein v. Frank, 52 F.3d 1035, 1040 (Fed. Cir. 1995) (a 50% overlap was insufficient for written description support). In this case, even generously interpreting the claims in GHC favor, the overlap was less than 50%, and did not indicate the claimed values.

Accordingly, the Board did not err in its analysis, and substantial evidence supported the Board’s finding of a lack of sufficient written description.

GHC also appealed the Board’s denial of its contingent motion to add a new claim. The new claim covered a particular species of the genus claim discussed above. The Court found that the Board was arbitrary and capricious in finding that GHC failed to meet its burden to show that the new claim was patentable. The Board did not engage in a substantive analysis or identify any particular ground on which GHC failed to establish patentability. The Board ignored GHC’s certification that it was not aware of any reason why the new claim was not patentable nor did the Board point to any inconsistency with the prosecution history. The Court reversed the Board’s denial of GHC’s contingent motion to add a new claim and remanded for further proceedings.

Take Away

The disclosure of a wide range with exemplary values does not provide written description support for a narrower claimed range, absent something to indicate the claimed range was considered critical or that inventor was in possession of the specific claimed embodiments. The Board cannot reject a motion to add a new claim to a patent application involved in an interference without explaining its findings.




Warning & Disclaimer: The pages, articles and comments on IPWatchdog.com do not constitute legal advice, nor do they create any attorney-client relationship. The articles published express the personal opinion and views of the author as of the time of publication and should not be attributed to the author’s employer, clients or the sponsors of IPWatchdog.com. Read more.

Join the Discussion

No comments yet.