logo

For the Inventor, By the Inventor

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 4265628 B1

PDFFull Text
Date of Patent:
May. 05, 1981

Filed:

Jul. 27, 1979

Process for the manufacture of fire resistant acrylic polymer yarns and

Applicant:
Inventors:

Pier P Rossi, Garlasco, IT;

Aldo Tempesti, Milan, IT;

Aldo Filippi, Bergamo, IT;

Assignee:

SNIA Viscosa Societa' Nazionale Industria, Milan, IT;

Attorney:

Ross; Karl F.

Primary Examiner:

Joseph L Schofer

Assistant Examiner:

Herbert J Lilling

Int. Cl.
CPC ...
D01F / ; D01F / ; C08F / ;
U.S. Cl.
CPC ...
81155 ; 525329 ; 525336 ; 525351 ; 81156 ; 525354 ; 260 / ;
Abstract

A process for the preparation of fire retardant formed bodies such as yarns and films of acrylic polymers is disclosed. The process comprises subjecting the polymer to sulphuration and subjecting the sulphurated polymer to a basic treatment by means of an alkali metal hydroxide, such as sodium hydroxide, whereby the polymer molecule acquires a cyclic structure.

Find Patent Forward Citations

Quick Actions:

Rossi, Pier. (1981). Process for the manufacture of fire resistant acrylic polymer yarns and (U.S. Patent No. 4265628). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4265628

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

Loading…