The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 1999
Filed:
Dec. 16, 1992
Richard Swisher, Northfield, MN (US);
James Andrew Phipps, Burnsville, MN (US);
Douglas Ray Pelleymounter, Northfield, MN (US);
James Leroy Grieser, Northfield, MN (US);
Sheldahl, Inc., Northfield, MN (US);
Abstract
A method for preparing a castable amorphous fluorocarbon coating upon the surface of a substrate which includes the steps of initially depositing a film of a fluorocarbon having a thickness between about 1500 .ANG. and 50,000 .ANG., and thereafter applying a second coating as a coverlay upon the initial film. Both the initial film and the castable coating consist of an amorphous fluorinated (ethylenic-cyclo oxyaliphatic substituted ethylenic) copolymer having the structural repeating unit: ##STR1## wherein 'm' and 'n' represent integers providing a molecular weight of between about 230,000 and 500,000, with the relative values of 'm' and 'n' providing a copolymer with a glass transition temperature ranging from between about 160.degree. C. and 240.degree. C.