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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.:

US 4152198 B1

PDFFull Text
Date of Patent:
May. 01, 1979

Filed:

Feb. 15, 1978

Isopropenyl ester sized paper and method for producing same

Applicant:
Inventors:

Samuel Serota, Philadelphia, PA (US);

Leonard S Silbert, Philadelphia, PA (US);

Gerhard Maeker, Oreland, PA (US);

Assignee:

The United States of America as represented by the Secretary of, , US;

Attorneys:

Silverstein; M. Howard

Scott; William E.

McConnell; David G.

Primary Examiner:

S Leon Bashore

Assistant Examiner:

Peter Chin

Int. Cl.
CPC ...
D21F / ;
U.S. Cl.
CPC ...
162128 ; 162132 ; 162135 ; 162136 ; 162158 ; 427395 ; 428453 ; 428537 ;
Abstract

Paper and paperboard made of felted cellulose fibers are chemically modified by applying to them an isopropenyl ester containing a catalytic amount of an acid catalyst and then heat curing the treated product. The process imparts water repellancy to the paper products with a very low degree of add-on, but with a very high degree of retention of tensile strength. The products also have excellent printability, are resistant to boiling water, and retain their opacity after exposure to water.

Find Patent Forward Citations

Serota, Samuel. (1979). Isopropenyl ester sized paper and method for producing same (U.S. Patent No. 4152198). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4152198

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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