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:
Nov. 08, 1983
Filed:
Mar. 29, 1982
Applicant:
Inventors:
Hans Hubecker, Dusseldorf, DE;
Friedrich Lenze, Dusseldorf, DE;
Gerhard Missaire, Ruppichteroth, DE;
Assignee:
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; B05D / ; B05D / ;
U.S. Cl.
CPC ...
427230 ; 427239 ; 427292 ;
Abstract
The surfaces of threads, sealing surfaces, and other load-bearing surfaces of oil field tubes or the like are treated by blasting surfaces to increase the roughness thereof to obtain a roughness of an average depth of from 7 to 15 micrometers under utilization of corundum or silicon carbide at a grain size of from 40 micrometers to 200 micrometers; a resin varnish is deposited onto the blasted surface for curing at higher than room temperature and including molybdenum sulfide at a layer thickness of from 5 to 20 micrometers. The varnish is cured in situ by heating.