Appeal No. 2002-1812
Application 08/861,181
Ferree et al. (Ferree) 5,051,892 September 24, 1991
Britton et al. (Britton) EP 0457112A2 November 11, 1991
Jefferson, David, Virtual Time, ACM Transactions on
Programming Languages and Systems, Vol. 7, No. 3, July 1985,
pp. 404-425, at pp. 412-417, section 4.2 (Jefferson).
We refer to the final rejection (Paper No. 30) and the
examiner's answer (Paper No. 33) (pages referred to as "EA__")
for a statement of the examiner's rejection, and to the appeal
brief (Paper No. 32) (pages referred to as "Br__") for a
statement of appellants' arguments thereagainst.
Claims 1, 4, and 10 stand rejected under 35 U.S.C. § 103(a)
as being unpatentable over Britton and Jefferson. The examiner
finds that Britton teaches the claimed invention except that it
does not explicitly teach sending a negative confirmation of
receipt (EA5). The examiner finds that Jefferson teaches
"rolling back the second unit of work (transmit an antimessage to
annihilate positive and negative messages) in response to
unsuccessful receipt of the messages by the receiver program
(message arrives at virtual clock 162), backing out the first
unit of work (rollback/unsend a message) in response to negative
confirmation (negative message)" (EA5-6).
Claims 2, 5, 8, and 9 stand rejected under 35 U.S.C.
§ 103(a) as being unpatentable over Britton and Jefferson,
further in view of Ranade and Ferree.
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