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:
Jan. 26, 1988
Filed:
Jun. 10, 1986
Applicant:
Inventors:
Heinz Grob, Dortmund, DE;
Friedrich-Otto Koch, Unna-Massen, DE;
Adolf Peeck, Hamm, DE;
Werner Wennemann, Dortmund, DE;
Assignee:
Hoesch Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 / ; 148127 ; 148150 ; 148154 ;
Abstract
For increasing the resistance of steel pipes or tubes against acidic medium, by a combination of a heat treatment and the use of an alloyed steel, a compressure stress is built up on the side of the tubes or pipes facing the acidic medium, of up to 30% of the yield limit.
Grob, Heinz. (1988). Method for making steel tubes or pipes of increased acidic gas resistance (U.S. Patent No. 4721536). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4721536
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile