US2511621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of cyclohexadiene polycarboxylic acids
Assignee: California Research LLC
•
Filing: 1946-02-08
•
Granted: 1950-06-13
•
Expires: 1966-02-08
Abstract
No abstract record available.
Inventors
- 👤 Paul C Condit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:47
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54; C08G63/553
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A POLYMERIC ESTER OF $3,5-CYCLOHEXADIENE DICARBOXYLIC ACID-1,2 AND GLYCOL.
Claim 2
Dependent Claim
9 words
A POLYMERIC ESTER OF $3,5-CYCLOHEXADIENE DICARBOXYLIC ACID-1,2 AND GLYCOL.
References Cited (Backward Citations)
US1860730A
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US1998744A
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US2323706A
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US2403791A
Cited
US2391226A
Cited
US2421876A
Cited
US2445553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-12 | 1953-12-12 | 1954-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-12 | 1957-12-12 | 1958-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-12 | 1961-12-12 | 1962-06-13 | $7700.00 | Window Closed / Lapsed |