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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 4619990 B1

PDFFull Text
Date of Patent:
Oct. 28, 1986

Filed:

Mar. 11, 1985

Polymeric dyes with pendent chromophore groups capable of undergoing

Applicant:
Inventor:

Mohamed A Elmasry, Woodbury, MN (US);

Assignee:

Minnesota Mining and Manufacturing Company, St. Paul, MN (US);

Attorneys:

Sell; Donald M.

Smith; James A.

Sherman; Lorraine R.

Primary Examiner:

Floyd D Higel

Int. Cl.
CPC ...
C07C / ; C07C / ; D09B / ; D09B / ; D09B / ; D09B / ; D09B / ; D09B / ;
U.S. Cl.
CPC ...
534573 ; 528423 ; 430 56 ; 524190 ; 430 69 ; 430 70 ; 524198 ; 430 71 ; 430 72 ; 524280 ; 430 73 ; 430 75 ; 524292 ; 430 76 ; 524556 ; 430 77 ; 524557 ; 430 78 ; 430495 ; 524565 ; 524715 ; 525191 ; 525204 ; 525222 ; 525227 ; 525233 ; 525238 ; 525242 ; 525279 ; 525300 ; 525301 ; 525302 ; 525312 ; 526217 ; 5262181 ; 526219 ; 5262191 ; 5262193 ; 526220 ; 528306 ; 528308 ; 528367 ; 528369 ; 528370 ; 528422 ;
Abstract

Polymeric dyes having pendent chromophore groups which are selected from azo, tricyanovinyl, anthraquinone, methine, and indoaniline groups fall into two classes, [A] condensation polymers, and [B] polymers derived from copolymerized ethylenically-unsaturated monomers, the dyes being capable of undergoing thermoplastic deformation by a focused laser beam when in a layer of thickness in the range of 0.1 to 100 micrometers and having an absorptivity in the range of 10 to 250 Lg.sup.-1 cm.sup.-1. They are film-forming, thermally- and light-stable, and solvent-coatable. These compounds are useful as coloring and light-absorbing agents, particularly as the light-absorbing agents in thin optical recording layers.

Find Patent Forward Citations

Elmasry, Mohamed. (1986). Polymeric dyes with pendent chromophore groups capable of undergoing (U.S. Patent No. 4619990). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4619990

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

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