Patent US2957022A successfully refreshed from Google Patents.
US2957022A
Expired / Lapsed
US
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Esters of cyclopentane-1, 3-dicarboxylic acid
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1957-04-30
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Granted: 1960-10-18
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Expires: 1977-04-30
Abstract
No abstract record available.
Inventors
- 👤 Charles A Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:28
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C07; C07C; C07C69/00; C07C69/34; C07C2601/00; C07C2601/06; C07C2601/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
AN ESTER HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
6 words
AN ESTER HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
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US2679509A
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US2729665A
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US2765334A
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US2840593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |