Appeal No. 1997-0009
Application No. 08/074,819
preparation of an HTV silicone composition by mixing
diorgano(poly)siloxane and silicon dioxide in an oscillating
single-shaft pilgrim-step kneader.
Appellants stipulate in their Brief (page 2) that the
appealed claims stand or fall together. Accordingly, we shall
limit our consideration to claim 1, the sole independent
claim, which reads as follows:
1. A process for the continuous preparation of an HTV
silicone composition which comprises mixing 100 parts by
weight of diorgano(poly)siloxane which has a viscosity of
50 to 100,000 Pas at 25EC with at least 20 parts by
weight of finely divided silicon dioxide which has a tamped
density of more than 0.01 kg/l in an oscillating single-
shaft pilgrim-step kneader.
The sole reference relied upon by the examiner on appeal
is:
Ž Stary et al. (Stary) 4,737,561 April 12,
1988
The following references are cited by appellants:
Ž Vulkan, "Silicones Chemistry and Technology," Vulkan
Publishing, 45-73 (1989).
Ž Noll, "Chemistry and Technology of Silicones," Academic
Press, 400-09 (1968).
The following rejections are before us for consideration:
I. Claims 1-10 stand rejected under 35 U.S.C. § 102(b) as
2
Page: Previous 1 2 3 4 5 6 7 8 Next
Last modified: November 3, 2007