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:
Mar. 31, 1992
Filed:
Jan. 26, 1990
Applicant:
Inventors:
Toyoichi Tanaka, Newton, MA (US);
Izumi Nishio, Somerville, MA (US);
Shao-Tang Sun, Arlington, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
523300 ; 524555 ;
Abstract
Ionized crosslinked polyacrylamide gels are provided that are capable of drastic volume changes in response to minor changes in solvent concentration, temperature of pH or salt concentration of the solvent. The gels can contain a metal ion.