Board of Patent Appeals Rejects Key Sony Invention Under 35 U.S.C. § 112, First Paragraph

MARK TERRY, ESQ.

The Board of Patent Appeals and Interferences affirmed a Patent Examiner’s rejection of claims covering a Sony heat-sink apparatus for computer or camera microprocessors under the written-description requirement of 35 U.S.C. § 112, first paragraph.

The specification described a glass substrate bonded to a silicon substrate and also referred generally to a main body containing multiple substrates. A representative claim, however, required a first glass with a first substrate and a second glass with a second substrate. The examiner concluded that the original disclosure did not adequately describe that second glass-and-substrate arrangement.

Sony argued that describing multiple substrates made from silicon or glass necessarily supported multiple glass substrates. The Board disagreed. It found that the disclosure conveyed only the specific glass-and-silicon arrangement and did not clearly establish possession of embodiments involving multiple glass substrates or multiple silicon substrates.

The governing written-description standard asks whether the application conveys with reasonable clarity to a person of ordinary skill that the inventor possessed the claimed subject matter as of the filing date. General language about alternatives or plural components may not support every later-claimed combination.

The practical lesson is to identify and expressly describe the embodiments that may become important during prosecution. A specification should not depend on inference when future claims may require specific combinations, materials, or component arrangements.