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. 19, 1985
Filed:
Nov. 29, 1984
Applicant:
Inventors:
Paolo Marini, Rome, IT;
Marcello Candiotti, Terni, IT;
Assignees:
Centro Sperimentale Metallurgico SpA, Rome, IT;
Terni - Societa per l'Industria e l'Elettricita SpA, Rome, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; C08K / ; C08L / ;
U.S. Cl.
CPC ...
428418 ; 428461 ; 428463 ; 428469 ; 523402 ; 523426 ; 523451 ; 524127 ; 524417 ; 528101 ;
Abstract
Sheet steel used for making the cores of electrical machines is improved as to its punchability by coating it with a heat resistant coating of a complex mixture of phosphates and resins compatible with acid phosphate ions. The coating contains between 60 and 95% by weight of the phosphates and between 5 and 40% by weight of the resins. The resins can be acrylic base resins, ethylene-vinyl acetate copolymer resins, or thermosetting epoxy resins.