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:
Apr. 21, 1992
Filed:
Apr. 16, 1991
Applicant:
Inventors:
Christian Burba, Herbern, DE;
Herbert Franz, Hamm, DE;
Alwin Krotzek, Werne, DE;
Werner Mrotzek, Dortmund, DE;
Assignee:
Schering AG, Bergkamen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ;
U.S. Cl.
CPC ...
156175 ; 156173 ; 156169 ; 156330 ;
Abstract
The invention relates to a process for the manufacture of pipe from composite materials for industrial and drinking water, produced by the filament-winding method from epoxy resins and 1,7-bis-[1-(2'-aminoethyl)-1,3-diaza-2-cyclopenten-2-yl]-heptane and/or 1,8-bis-[1-(2'-aminoethyl)-1,3-diaza-2-cyclopenten-2-yl]octane as curing agents and commonly used reinforcing materials.