Patent US4189452A successfully refreshed from Google Patents.
US4189452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester resin composition
Assignee: AOC LLC
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Filing: 1977-12-30
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Granted: 1980-02-19
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Expires: 1997-12-30
Abstract
Abstract A polyester resin composition is disclosed. The composition consists essentially of a blend of a diethylene glycol:neopentyl glycol:maleic:isophthalic acid polyester and a propylene glycol:isophthalic acid:maleic polyester, together with a copolymerizable monomer in an amount sufficient for reaction with the polyester blend to produce a thermoset article. In a preferred disclosed composition, the blend is composed from about 5 to 15 percent by weight of the diethylene glycol polyester and from about 95 to 85 percent of the propylene glycol polyester, together with from 35 to 45 percent by weight of styrene as a copolymerizable monomer, based upon the weight of the polyester blend and styrene.
Inventors
- 👤 George N. Haddad
- 👤 Frederick A. Butt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:29
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/676
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
42 words
A polyester resin composition consisting essentially of a blend of a diethylene glycol:neopentyl glycol:maleic:isophthalic acid polyester and a propylene glycol:isophthalic acid:maleic polyester, together with a copolymerizable monomer in an amount sufficient for reaction with the polyester blend to produce a thermoset article.
Claim 2
Dependent Claim
42 words
A polyester resin composition consisting essentially of a blend of a diethylene glycol:neopentyl glycol:maleic:isophthalic acid polyester and a propylene glycol:isophthalic acid:maleic polyester, together with a copolymerizable monomer in an amount sufficient for reaction with the polyester blend to produce a thermoset article.
Claim 3
Dependent Claim
13 words
A composition as claimed in claim 1 wherein the copolymerizable monomer is styrene.
Claim 4
Dependent Claim
22 words
A composition as claimed in claim 2 wherein the diethylene glycol polyester constitutes from about 5 to 15 percent of the blend.
Claim 5
Dependent Claim
33 words
A composition as claimed in claim 3 wherein the molecular proportions of the diethylene glycol polyester are substantially 1:5:2:4 for the diethylene glycol, the neopentyl glycol, the maleic and the isophthalic acid, respectively.
Claim 6
Dependent Claim
30 words
A composition as claimed in claim 4 wherein the molecular proportions of the propylene glycol polyester are subsetantially 21/2:1:1 for the propylene glycol, the isophthalic acid and the maleic, respectively.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |