Appeal No. 1997-1556
Application 08/340,247
Trialkoxyalkyl phosphate is an phosphoric acid ester which may be represented by the following
structural formula:
O
alkyl O alkyl O P O alkyl O alkyl
O
alkyl
O
alkyl
“Alkyl” represents a monovalent radical of the form C H -. Butyl (n=4) and ethyl (n=2) are two
n 2n+1
examples. “P” represents phosphorus and “O” represents oxygen. Applicants’ specification indicates that
a preferred trialkoxyalkylphosphate is tributoxyethylphosphate. In the above formula, the end most alkyl
radical in each branch is butyl and the interior alkyl is ethyl. The preferred compound can be depicted by
the following structural formula:
O
CH3(CH2)3 (CH2)2 O P O (CH2)2 O (CH2)3CH3
O
(CH2)2
O
(CH2)3CH3
The hydraulic fluid also includes a “natural triglyceride” diluent. According to the specification, the
natural triglyceride diluents include animal fats and vegetable oils:
3
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Last modified: November 3, 2007