Patent EP0450812A1 successfully refreshed from Google Patents.
US2806860A
Expired / Lapsed
US
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Epoxyalkyl succinic anhydrides
Assignee: Union Carbide Corp
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Filing: 1955-07-20
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Granted: 1957-09-17
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Expires: 1975-07-20
Abstract
No abstract record available.
Inventors
- 👤 Phillips Benjamin
- 👤 Paul S Starcher
- 👤 Donald L Heywood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:48
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/38; C07D303/40; C07D303/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AN EPOXYALKYLSUCCINIC ANHYDRIDE CHARACTERIZED BY THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
8 words
AN EPOXYALKYLSUCCINIC ANHYDRIDE CHARACTERIZED BY THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |