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. 20, 1979
Filed:
Mar. 24, 1978
Applicant:
Inventor:
Ernest L Neu, Redondo Beach, CA (US);
Assignee:
Grefco, Inc., Bala Cynwyd, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210 75 ; 210503 ;
Abstract
Improved, low-cost filter aid materials are made from polyurethane and related polymers. A foam of the polymeric material is comminuted to eliminate substantially all closed cells. The resulting particles are graded to a desired average particle size.
Neu, Ernest. (1979). Method for making polymeric filter aids and products thereof (U.S. Patent No. 4145284). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4145284
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile