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:
Jun. 08, 1982
Filed:
Oct. 26, 1978
Applicant:
Inventor:
Hans-Martin Schmidtchen, Osnabruck, DE;
Assignee:
Kabel und Metallwerke Gutehoffnungshutte A.G., Hanover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264 459 ; 264 50 ; 264D / ; 521 79 ; 521 81 ; 521 82 ; 521134 ; 521143 ; 521154 ;
Abstract
An elastomeric or thermoplastic polymer, such as polyethylene, is mixed with silane for grafting onto the polyethylene; after grafting the material is extruded around a cable, a conductor, tubing or the like, but just prior to extrusion moist nitrogen is forced into the extruder so that the material will expand to foam, the cells being filled with moist gas so that the cell walls crosslink to stabilize the resulting foam sheath.