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:
Sep. 18, 1990
Filed:
Aug. 22, 1989
Applicant:
Inventors:
Assignee:
Lonza Ltd., Gampel, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21B / ; B21B / ;
U.S. Cl.
CPC ...
72208 ; 72 97 ; 72201 ;
Abstract
Mandrel rod (1) for pipe rolling mills, in which hollow billet (5) is rolled on mandrel rod (1), consists of two pipes (2, 3) lying inside one another. Annular gap (4) between pipes (2, 3) is filled with a thermosetting plastic, whose coefficient of expansion is selected large enough so that the thermosetting plastic completely fills annular gap (4), even with temperature differences, between pipes (2, 3).
Fischer, Francis. (1990). Mandrel rod for pipe rolling mills (U.S. Patent No. 4956988). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4956988
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile