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:
Jul. 28, 2026
Filed:
Dec. 16, 2021
Bridgestone Corporation, Chuo-ku, JP;
Mark N. Dedecker, North Canton, OH (US);
Christian Andrews, Kent, OH (US);
Bridgestone Corporation, Chuo-ku, JP;
Abstract
In various embodiments, methods for extracting various constituents fromresin are disclosed. The methods begin with a nonpolar resin solution that is manipulated by polar solvent and water additions to precipitate low MW isoprene rubber and form separable aqueous polar and nonpolar liquid fractions, wherein the aqueous polar liquid fraction is rich in argentatins and the nonpolar liquid fraction is rich in guayulins. In other variations, an aqueous polar solvent is added to the nonpolar resin solution to directly produce a two-phase system. The extraction methods can be fully automated by using a continuous countercurrent liquid/liquid extractor.