Patent US2865931A successfully refreshed from Google Patents.
US2865931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Maleinated eleostearic acids
Assignee: Individual
•
Filing: 1953-11-03
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Granted: 1958-12-23
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Expires: 1973-11-03
Abstract
No abstract record available.
Inventors
- 👤 Charles H Mack
- 👤 William G Bickford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:35
CPC Classifications
C; C07; C07D; C07D407/00; C07D407/02; C07D407/04; C07D303/00; C07D303/02; C07D303/38; C07D303/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
6 words
AN EPOXIDIZED ELEOMALEATE OF THE FORMULA
Claim 2
Dependent Claim
6 words
AN EPOXIDIZED ELEOMALEATE OF THE FORMULA
Claim 3
Dependent Claim
22 words
A TRICARBOXYLIC ACID EPOXIDIZED ELEOMALEATE OF THE FORMULA OF CLAIM 1 IN WHICH R REPRESENTS A HYDROGEN ATOM AND R1 REPRESENTS (-OR)2-.
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) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |