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:
Jan. 23, 1979
Filed:
Jan. 08, 1975
Thomas L Staples, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
A fluid having an improved viscosity/temperature relationship results from a blend of that fluid and a block copolymer having an AB configuration wherein the A portion is a polymeric structure that is insoluble in said oil below a characteristic temperature and soluble above that temperature and the B portion is a polymeric structure that is soluble in said fluid over the complete range of temperature for which the liquid composition will be used and wherein the chain length of said B portion is small relative to that of said A portion. Fluid compositions having a relatively constant viscosity over an extended temperature range result when two or more such block polymers are blended with the fluid.