Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Silicon dioxide – silicic acid – orthosilicate – or...
Reexamination Certificate
2006-11-28
2006-11-28
Thexton, Matthew A. (Department: 1714)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Silicon dioxide, silicic acid, orthosilicate, or...
C508S143000, C508S308000
Reexamination Certificate
active
07141535
ABSTRACT:
In a particular embodiment, the invention concerns a lubricating grease having 70 to 95 percent by weight of a mixture that includes at least a first ester of fatty acid and of sorbitan, and at least a second ester of fatty acid and of polyoxyalkylated sorbitan. The esters are present in quantities by weight, relative to the weight of the mixture, of 10 to 90 percent and 90 to 10 percent respectively. The grease also includes from 5 to 30 percent by weight of at least one thickening agent.
REFERENCES:
patent: 2652361 (1953-09-01), Woods et al.
patent: 2980612 (1961-04-01), Potter
patent: 3647690 (1972-03-01), Cross
patent: 4298481 (1981-11-01), Clarke
patent: 5236606 (1993-08-01), Rangel
patent: 0210356 (1987-04-01), None
patent: 0248188 (1987-04-01), None
patent: 0626420 (2001-04-01), None
Derwent abstract ACC-No. 1988-177099, for patent ES-8801941A (May 16, 1988).
Belot Pierre
Pinoche Jean-Marie
Thexton Matthew A.
Townsend and Townsend / and Crew LLP
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