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. 15, 1977
Filed:
Oct. 17, 1975
Applicant:
Inventors:
Marvin M Fein, Westfield, NJ (US);
Earl P Williams, Pen Argyl, PA (US);
Nathan D Field, Wyckoff, NJ (US);
Assignee:
GAF Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210289 ;
Abstract
A system for sustained release of phenolic material into a fluid from phenolic complexes of water-insoluble, but water-swellable crosslinked N-vinyllactam or N-alkyl-N-vinylamide polymers in the form of porous beads or granules. The complexes, which are particularly suited for use in situations wherein fluids containing phenolic materials in limited quantities are desired, and are provided by leaching a limited amount of phenolic material from the complex by contacting the porous granules in a container, such as in a canister or column which is used to treat liquids or water.