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:
Mar. 29, 1994
Filed:
Dec. 20, 1991
William H Edwards, III, Port St. Lucie, FL (US);
John A Harris, III, West Palm Beach, FL (US);
Edward S Smith, Lake Worth, FL (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
A method is taught for protecting fuel contacting surfaces of a gas turbine engine from carbon deposition by heating the element in a nitrogen containing atmosphere for sufficient time to cause penetration and absorption of nitrogen into the grain boundaries of the alloy surface, which acts as a barrier between the hydrocarbon fuel and the catalytic elements in the surfaces. The method includes heating at a temperature of 1800-1850 F. for about one hour, cooling to 1525-1575 F. and holding for about four hours, and cooling to a temperature of 1375-1425 F. and holding for about 16 hours.