Patent US3683045A successfully refreshed from Google Patents.
US3683045A
Expired / Lapsed
US
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Phenothiazine stabilized vinyl ester resins
Assignee: Individual
•
Filing: 1970-12-02
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Granted: 1972-08-08
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Expires: 1990-12-02
Abstract
Abstract Phenothiazine has been found to be an effective gellation inhibitor for thermosettable vinyl ester resins without adversely affecting the catalyzed gel times and cure times as measured by the SPI exotherm test.
Inventors
- 👤 Walton Leon Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:02
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; C08G59/1461; C08K; C08K5/00; C08K5/36; C08K5/45; C08K5/46; Y; Y10; Y10S; Y10S525/00; Y10S525/922
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
14 words
The resin composition of claim 1 containing about 0.001 to 0.05 percent of phenothiazine.
Claim 2
Dependent Claim
18 words
The resin composition of claim 1 wherein said vinyl ester resin is further admixed with a copolymerizable monomer.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein said vinyl ester resin is further reacted with a dicarboxylic acid anhydride.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein said polyepoxide is an epoxy novolac.
Claim 5
Dependent Claim
16 words
The composition of claim 1 wherein said Polyepoxide is a polyglycidyl ether of a polyhydric alcohol.
Claim 6
Dependent Claim
13 words
The composition of claim 3 wherein said monomer is vinyl toluene or monochlorostyrene.
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |