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:
Feb. 28, 1978
Filed:
Feb. 27, 1976
Applicant:
Inventors:
Richard Benjamin Hammer, Morris Plains, NJ (US);
Albin Frank Turbak, Convent Station, NJ (US);
Norman A Portnoy, Hopatcong, NJ (US);
West, Arthur C, St. Paul, MN (US);
Assignee:
International Telephone and Telegraph Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08B / ;
U.S. Cl.
CPC ...
536 30 ; 264183 ; 264187 ; 264188 ; 536 35 ; 536 57 ;
Abstract
Regenerated cellulosic articles are produced by nitrosating and dissolving cellulose in a dialkylacylamide solvent, such as dimethylformamide, and regenerating the dissolved cellulose by passing into a coagulant bath. The coagulant comprises water or a 1 to 4 carbon atom aliphatic monohydric alcohol and a soluble reactive base, the latter in an amount ranging from 6% to 25% by weight of the regenerant. The process produces regenerated cellulose products of improved resistance to alkaline solubility.