Appeal No. 2000-0855
Application No. 08/597,377
polyester, rayon, nylon, and polyurethane foam. See col. 5,
ll. 5-58.
Lawson teaches a diaper including a flap elastic member
60 made of natural rubber, elastomeric films, polyurethane
films, elastomeric foams, and formed elastic scrim. In
addition, Lawson teaches that the flap elastic members 60 may
comprise a single strand of elastic material or may comprise
several parallel or nonparallel strands of elastic material.
See col. 8, ll. 29-52.
The examiner cites Hasse and Lawson as evidence that
prior to the appellants’ invention elastomeric foams and
rubbers were known in the art to be equivalent and
interchangeable with elastomeric films and that single elastic
bands were known in the art to be equivalent and
interchangeable with plural elastic
bands. In addition, the examiner determined that it would
have been obvious prior to the appellants’ invention to
substitute the materials taught by Hasse and Lawson for the
elastomeric film used by Proxmire in making the carrier sheet
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