Appeal No. 1997-1684
Application No. 08/223,916
and the other described by the formula:
OR'2
š
R' __ ____ ____Si R'
1 4
š
OR'3
wherein R' is an alkyl or cycloalkyl group containing at
1
least one primary, secondary or tertiary carbon atom attached
to the silicon atom, R' and R' are an alkyl or aryl group,2 3
R' and R' being the same or different; and R' is an alkyl2 3 4
group with a primary carbon attached to the silicon atom, R'1
and R' being the same or different;
4
(d) introducing the catalyst into a polymerization
reaction zone containing said organoaluminum compound, said
electron donors and monomer; and
(e) extracting polypropylene from the polymerization
reaction zone.
The references of record relied upon by the examiner as
evidence of obviousness are:
Shamshowm et al. (Shamshoum) 5,308,818 May 3,
1994
(filing date: June 8, 1992)
Hoppin et al. (Hoppin) 4,829,038 May 9, 1989
Ewen 4,927,797 May 22,
1990
The following rejections are before us for consideration:3
3By Advisory Action (Paper No. 8), the examiner has
indicated that a previously applied rejection under the second
3
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 Next
Last modified: November 3, 2007