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US4981933A Expired / Lapsed US ⏱️ 0.0 years remaining

Azlactone copolymers

Assignee: Intellectual Ventures I LLC
•
Filing: 1989-06-23
•
Granted: 1991-01-01
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Expires: 2009-06-23
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Abstract

Abstract Azlactone copolymers having at least two different reactive groups and useful as intermediates for the production of a variety of useful polymeric materials contain repeating units according to the formula (I) ##STR1## wherein R 1 is hydrogen or alkyl (e.g., methyl); each of R 2 and R 3 is hydrogen, alkyl (e.g., methyl, ethyl, propyl, isopropyl); aryl (e.g., phenyl, naphthyl), alkaryl (e.g., tolyl), aralkyl (e.g., benzyl), cycloalkyl (e.g., cyclohexyl, adamantyl), or R 2 and R 3 together with the carbon atom to which they are bonded constitute a carbocyclic or heterocyclic ring; each of R 4 and R 5 is hydrogen or alkyl (e.g., methyl, ethyl); Z is halogen, such as chlorine and each of a and b represents a mole proportion of each of the respective units.

Inventors

  • 👤 Robert C. Fazio
  • 👤 Lloyd D. Taylor

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 22:52
CPC Classifications
C; C08; C08F; C08F226/00; C08F226/06; C08F212/00; C08F212/02; C08F212/04; C08F212/14; C08F212/16; C08F212/18; C08F8/00; C08F8/44; Y; Y10; Y10S; Y10S430/00; Y10S430/142

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 85 words
A copolymer containing repeating units according to the formula (I) ##STR16## wherein R 1 is hydrogen or alkyl; each of R 2 and R 3 is hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, or R 2 and R 3 together with the carbon atom to which they are bonded constitute a carbocyclic or heterocyclic ring; each of R 4 and R 5 is hydrogen or alkyl; Z is halogen, and each of a and b represents a mole proportion of each of the respective repeating units.
Claim 2
Dependent Claim 85 words
A copolymer containing repeating units according to the formula (I) ##STR16## wherein R 1 is hydrogen or alkyl; each of R 2 and R 3 is hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, or R 2 and R 3 together with the carbon atom to which they are bonded constitute a carbocyclic or heterocyclic ring; each of R 4 and R 5 is hydrogen or alkyl; Z is halogen, and each of a and b represents a mole proportion of each of the respective repeating units.
Claim 3
Dependent Claim 10 words
The copolymer of claim 1 wherein R 1 is hydrogen.
Claim 4
Dependent Claim 15 words
The copolymer of claim 2 wherein each of R 2 and R 3 is alkyl.
Claim 5
Dependent Claim 15 words
The copolymer of claim 3 wherein each of R 2 and R 3 is methyl.
Claim 6
Dependent Claim 15 words
The copolymer of claim 3 wherein each of R 4 and R 5 is hydrogen.
Claim 7
Dependent Claim 11 words
The copolymer of claim 5 wherein Z is a chlorine atom.
Claim 8
Dependent Claim 19 words
The copolymer of claim wherein R 1 is hydrogen and each of R z and R 3 is methyl.
Claim 9
Dependent Claim 18 words
The copolymer of claim 7 wherein the molar ratio of a to b is from 1:4 to 4:1.

References Cited (Backward Citations)

GB1121418A Cited
US3488327A Cited
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-12-31 1994-07-02 1995-01-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-12-31 1998-07-02 1999-01-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-12-31 2002-07-02 2003-01-01 $7700.00 Window Closed / Lapsed

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