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:
Nov. 13, 1984
Filed:
Mar. 23, 1983
Hiroyuki Kudomi, Kitakyusyu, JP;
Shinichi Sato, Kitakyusyu, JP;
Mitsubishi Chemical Industries, Limited, Tokyo, JP;
Abstract
A partially-hydrolyzed, solid acrylamide polymer is prepared by bringing a hydrous gel of a water-soluble acrylamide polymer into contact with an aqueous caustic alkali solution, maintaining the polymer at an elevated temperature and under highly humid conditions to hydrolyze certain amido groups of the water-soluble acrylamide polymer and then drying the thus partially-hydrolyzed acrylamide polymer. The resultant polymer contains less water-insoluble components and hardly forms precipitate even in salt water containing calcium ions. It can be suitably used for coagulation of suspension and in secondary oil recovery.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile