Appeal No. 2002-1622 Page 2
Application No. 08/735,836
THE CLAIMED SUBJECT MATTER
The claims are directed to a polymeric mixture. Claims 1 and 38 are illustrative:
1. A mixture comprising (a) at least one polymer selected from the group
consisting of a thermoplastic polymer, an elastomeric thermoset polymer and
mixtures thereof, excluding polydiorganosiloxane fluids, and (b) a polymer
having (i) soft polydiorganosiloxane units, (ii) hard polyisocyanate residue units,
(iii) optionally, soft and/or hard organic polyamine residue units, and (iv) terminal
groups; wherein (i), (ii) and (iii) are interconnected through urea linkages, and
polymer (a) is immiscible with polymer (b).
38. A mixture obtained by the process comprising blending together, in the
absence of a solvent, (a) at least one polymer selected from the group consisting
of a thermoplastic polymer, an elastomeric thermoset polymer and mixtures
thereof, excluding polydiorganosiloxane fluids, and (b) a polymer having (i) soft
polydiorganosiloxane units, (ii) hard polyisocyanate residue units, (iii) optionally,
soft and/or hard organic polyamine residue units, and (iv) terminal groups;
wherein (i), (ii) and (iii) are interconnected through urea linkages.
THE EVIDENCE
As evidence of unpatentability, the Examiner relies upon the following prior art
references:
Tushaus et al. (Tushaus) 5,290,615 Mar. 01, 1994
Birkholz et al. (Birkholz) 5,663,227 Sep. 02, 1997
(filed Mar. 14, 1996)
THE REJECTIONS
Claims 1, 3, 6, 21, 24-26, 38-42 stand rejected under 35 U.S.C. § 103(a) as being
unpatentable over Birkholz in view of Tushaus. Claims 50-57 stand rejected under 35 U.S.C.
§ 112, ¶ 1 as lacking an adequate written description.
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