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:
Jul. 13, 1976
Filed:
Oct. 22, 1971
Applicant:
Inventor:
Helmut Landgraf, Rumeln-Kaldenhausen, DT;
Assignee:
Mannesmann Aktiengesellschaft, Dusseldorf, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ; F16L / ;
U.S. Cl.
CPC ...
156158 ; 156162 ; 156190 ; 156195 ; 156229 ; 156244 ; 156275 ; 156294 ; 156296 ; 219 62 ; 285 21 ;
Abstract
A thermoplastic coupler sleeve for interconnecting tubes or pipes is made by extruding thermoplastic material, e.g., polyethylene, to make a ribbon, and wrapping the ribbon around a heater coil in as many layers as needed to obtain the sleeve.