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:
Dec. 31, 2013
Filed:
Aug. 29, 2008
Richard C. Albert, Landenberg, PA (US);
Craig King Hennessey, Avondale, OH (US);
Laurence Waino Mckeen, Sewell, NJ (US);
Jurgen F. A. Hofmans, Puurs, BE;
Raf Moens, Mechelen, BE;
Richard C. Albert, Landenberg, PA (US);
Craig King Hennessey, Avondale, OH (US);
Laurence Waino McKeen, Sewell, NJ (US);
Jurgen F. A. Hofmans, Puurs, BE;
Raf Moens, Mechelen, BE;
E I du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Pipe useful for downhole and transport of hydrocarbon fuel such as oil and/or natural gas is provided that has a non-stick coating adhered to the pipe interior surface, said coating being at least about 50 μm thick and comprising at least two layers constituting an inner layer and an outer layer adhered to one another, each said layers containing polymer binder and fluoropolymer and being at least about 15 μm thick, the weight proportion of said polymer binder to said fluoropolymer in said inner layer and in said outer layer but being effective to maintain adhesion between said layers during pressurization and decompression upon said non-stick coating being exposed to the Autoclave Test and the proportion of said fluoropolymer in said inner layer and said outer layer being effective to protect said interior surface during exposure of said non-stick coating to the Acid Soak Test.