US2527806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dicarboxylic acid anhydride-4-vinylcyclohexene diepoxide reaction products
Assignee: EIDP Inc
•
Filing: 1948-02-10
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Granted: 1950-10-31
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Expires: 1968-02-10
Abstract
No abstract record available.
Inventors
- 👤 Robert E Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:39
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/40; C08G63/42; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS WHICH COMPRISES HEATING, AT A TEMPERATURE OF FRO ABOUT 75*C. TO ABOUT 250*C. AND UNTIL POLYMERIZATION TAKES PLACE AN ANHYDRIDE OF A DICARBOXYLIC ACID AND 4-VINYLCYCLOHEXENE DIEPOXIDE IN A MOLE RATIO OF FROM 0.95 TO 1.25 MOLES OF SAID ANHYDRIDE TO 1.0 MOLE OF SAID DIEPOXIDE.
Claim 2
Dependent Claim
48 words
A PROCESS WHICH COMPRISES HEATING, AT A TEMPERATURE OF FRO ABOUT 75*C. TO ABOUT 250*C. AND UNTIL POLYMERIZATION TAKES PLACE AN ANHYDRIDE OF A DICARBOXYLIC ACID AND 4-VINYLCYCLOHEXENE DIEPOXIDE IN A MOLE RATIO OF FROM 0.95 TO 1.25 MOLES OF SAID ANHYDRIDE TO 1.0 MOLE OF SAID DIEPOXIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |