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:
Dec. 22, 2009
Filed:
Nov. 08, 2005
Rajiv Manohar Banavali, Rydal, PA (US);
Kim Sang Ho, Richboro, PA (US);
Rajiv Manohar Banavali, Rydal, PA (US);
Kim Sang Ho, Richboro, PA (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
A method for monitoring degradation of lubricating oils. The method comprises steps of: (a) adding to a lubricating oil at least one compound having formula (I) wherein Rand Rindependently are hydrogen, hydroxy, OR, amino or NRR; Rand Rindependently are alkyl, aryl, aralkyl, heteroalkyl or heterocyclic; Rand Rindependently are hydrogen or alkyl; R, R, Rand Rindependently are cyano, nitro, amide, carboxyl, ester, alkyl or hydrogen; Ris alkyl, aryl, aralkyl, heteroalkyl, heterocyclic or alkanoyl; Ris hydrogen or alkyl; provided that said at least one compound of formula (I) has at least one substituent selected from among cyano, nitro, hydroxy, hydroxyalkyl, amide, carboxyl, ester and unsaturated alkyl; and (b) measuring a spectroscopic property of the oil to determine degradation of said at least one compound.