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:
May. 19, 1981
Filed:
Nov. 13, 1979
Applicant:
Inventors:
Michael Ahlgrim, Erftstadt, DE;
Gerhard Mietens, Hurth-Efferen, DE;
Franz-Josef Dany, Erftstadt, DE;
Joachim Kandler, Erftstadt, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ; C10M / ; C10M / ; C10M / ;
U.S. Cl.
CPC ...
252 25 ; 252 493 ; 252 498 ; 252 499 ; 252 74 ; 423305 ; 423307 ;
Abstract
The invention relates to a long chain ammonium polyphosphate and its use as an effective additive in lubricants and/or coolants for metal working under extremely high pressures and temperatures. The polyphosphate chain preferably contains 50 to 1000 phosphorus atoms. Up to 20% of the ammonium groups are replaceable by hydrogen. The additive is preferably added to the lubricant/coolant in a proportion of 0.1 to 30 weight %.