Patent US1979810A successfully refreshed from Google Patents.
Patent US3764584A successfully refreshed from Google Patents.
US3764584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable compositions
Assignee: Novartis AG
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Filing: 1971-11-17
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Granted: 1973-10-09
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Expires: 1991-11-17
Abstract
Abstract Compositions comprising A. A DIGLYCIDYL ESTER OF FORMULA AND B. A POLYCARBOXYLIC ANHYDRIDE OF FORMULA WHERE, IN EACH FORMULA, ONE OF R1 to R6 is a hydrogen atom or a methyl or allyl group and the remaining R''s denote hydrogen atoms, on being cured, show a very high thermal resistance and may be used as laminating resins, surface-coating resins, dipping resins, casting resins, adhesives, and potting and insulating materials for the electrical industry.
Inventors
- 👤 P Hope
- 👤 R Martin
- 👤 B Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:06
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4215; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/16; C08G59/20; C08G59/22; C08G59/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
27 words
The compositions according to claim 1, containing from 0.75 to 0.95 anhydride equivalents of the carboxylic acid anhydride (b) per 1,2-epoxide equivalent of the diglycidyl ester (a).
Claim 2
Dependent Claim
12 words
The compositions according to claim 1, comprising diglycidyl bicyclo(2.2.1)hept-5-ene-2,3-dicarboxylate and methylbicyclo(2.2.1)hept-5-ene2,3-dicarboxylic anhydride.
Claim 3
Dependent Claim
12 words
The compositions according to claim 1, comprising diglycidyl bicyclo(2.2.1)hept-5-ene-2,3-dicarboxylate and allylbicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic anhydride.
Claim 4
Dependent Claim
14 words
The compositions according to claim 1, comprising diglycidyl methylbicyclo(2.2.1)hept-5-ene-2,3-dicarboxylate and methylbicyclo 2.2.1 hept-5-ene-2,3-dicarboxylic anhydride.
Claim 5
Dependent Claim
21 words
Cured products obtained by heating a composition as claimed in claim 1 at a temperature of from 175* to 275* C.
References Cited (Backward Citations)
FR2000323A1
Cited
US3598749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |