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:
Oct. 29, 1991
Filed:
Nov. 06, 1990
Applicant:
Inventors:
Peter E Zdenek, Trenton, NJ (US);
James T VerShaw, Tyler, TX (US);
Assignee:
American Standard, Inc., New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F28F / ; F28D / ;
U.S. Cl.
CPC ...
165170 ; 165147 ; 126 / ; 1261 / ;
Abstract
A serpentine passage for a gas furnace clam shell-type heat exchanger comprising a serpentine passage having an inlet and an outlet where the serpentine passage, from the outlet toward the inlet, is shaped as a leaning, cursive w with the trailing end curling downwardly and underlining the w.