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. 27, 1988
Filed:
Apr. 09, 1987
Applicant:
Inventor:
R Scott Morris, Fairhaven, MA (US);
Assignee:
Cape Cod Research, Inc., Buzzards Bay, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
422 55 ; 422 56 ; 422 57 ; 436 61 ;
Abstract
A new and improved on-site method for protecting an internal combustion engine in the field for maximizing service time by determining the change point of the lubricating oil. The on-site method utilizes a new colorimetric method and apparatus which serves as an indicator of the amount of acid build-up in the lubrication oil. The apparatus is a test strip formed from a polymeric matrix comprised of ion-rich domains known as an ionomer. A dye is bonded to the ion-rich domains and then activated by dipping the test strip in a basic solution.