Appeal No. 96-2888
Application No. 08/222,495
The subject matter on appeal relates to a low phosphorous
lubricating oil composition for internal combustion engines which
comprises a wear inhibiting and corrosion inhibiting effective
amount of a secondary zinc dialkyldithiophosphate and a
thiocarbamate antiwear agent selected from a group of compounds
having a particular formula. The composition has a phosphorous
content of about from 0.03 to 0.09 wt.%, and the phosphorous
content is attributable to the phosphorous content of said zinc
dialkyldithiophosphate. A copy of the appealed claims including
representative independent claim 1 appears in the appendix of the
appellants’ Brief.
The references relied upon by the examiner as evidence of
obviousness are:
Holubec 3,876,550 Apr. 8, 1975
Newingham et al. (Newingham) 3,923,669 Dec. 2, 1975
Thorsell et al. (Thorsell) 4,648,985 Mar. 10, 1987
All of the claims on appeal stand rejected under 35 U.S.C.
§ 103 as being unpatentable over Holubec and/or Thorsell in view
of Newingham2.
2
2 The appealed claims will stand or fall together as
indicated by the appellants on page 4 of their Brief.
2
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