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:
Nov. 16, 1976
Filed:
Feb. 06, 1975
Applicant:
Inventors:
Willem Gerholt, Hardenberg, NL;
Gerrit Heidemann, Oldenzaal, NL;
Assignee:
Industriele Onderneming Wavin N.V., Swolle, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B32B / ;
U.S. Cl.
CPC ...
156 86 ; 156187 ; 156195 ; 156244 ; 138149 ; 138150 ; 138D / ; 428 36 ; 428315 ; 428913 ;
Abstract
A foam plastic layer is sprayed onto a metal pipe, whereafter a tape of polyethylene at the extrusion temperature is helically wound around the foam layer.
Gerholt, Willem. (1976). Connections for insulated pipes (U.S. Patent No. 3992237). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3992237
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile