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. 12, 2011
Filed:
Apr. 08, 2005
Applicants:
Manfred A. A. Lupke, Thornhill, CA;
Stefan A. Lupke, Thornhill, CA;
Inventors:
Manfred A. A. Lupke, Thornhill, CA;
Stefan A. Lupke, Thornhill, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D01D 5/24 (2006.01); B28B 1/02 (2006.01); B29C 51/08 (2006.01); B29C 57/00 (2006.01); B29C 47/00 (2006.01); B29C 43/22 (2006.01); B29C 59/00 (2006.01); B23D 21/06 (2006.01); B26D 3/16 (2006.01); A01J 21/00 (2006.01); A01J 25/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A piece of corrugated pipe cut from a longer length of pipe is provided with a pipe coupling part by subjecting one or more of the corrugation crests on the pipe to heat and pressure. This reshapes the one or more corrugations to form a seal receiving recessed spigot on the piece of pipe.