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:
Jun. 01, 1976
Filed:
Jul. 25, 1974
Applicant:
Inventors:
Charles F Raley, Jr, Midland, MI (US);
Delman R Asher, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ;
U.S. Cl.
CPC ...
252444 ; 131264 ; 131269 ; 252422 ; 260 / ; 423445 ; 264 29 ; 423449 ;
Abstract
Activated, macroporous open-cell carbon foam which is particularly useful as a filter for cigarette smoke and the like, is prepared by contacting, at a temperature of at least about 25.degree.C a normally crystalline vinylidene chloride polymer in substantially open-cell, macroporous foam form with liquid ammonia until at least about 50 percent of theoretical Cl.sup.- is removed, then heating said foam to a temperature sufficient to remove residual ammonium chloride.
Raley, Jr, Charles. (1976). Process for preparing macroporous open-cell carbon foam from normally (U.S. Patent No. 3960770). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3960770
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile