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:
Jun. 04, 1991
Filed:
Mar. 14, 1990
Applicant:
Inventor:
S Raghuma Reddy, West Bloomfield, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
55 58 ; 55 68 ; 55389 ; 55 74 ; 55208 ; 123518 ;
Abstract
Vehicle tank pressure is controlled by adsorbing air from the tank in a zeolite bed, and passing fuel vapor back to the tank. The zeolite is later regenerated by application of heat and vacuum.