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. 03, 1987
Filed:
May. 23, 1985
Applicant:
Inventor:
Franciscus Roffelsen, Helmond, NL;
Assignee:
Spiro Research B.V., Helmond, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F28F / ;
U.S. Cl.
CPC ...
165181 ; 165146 ;
Abstract
An economical pipe for use in a utility or service system, particularly a circulating hot water supply system or a heat exchanger system requiring outgoing and incoming hot water paths. The pipe possesses a partition wall dividing it longitudinally into two ducts.