Patent US3071597A successfully refreshed from Google Patents.
US3071597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of bicyclo[2.2.2]oct-2-ene-1, 4-dicarboxylic acid and a process for their formation
Assignee: EIDP Inc
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Filing: 1960-05-16
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Granted: 1963-01-01
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Expires: 1980-05-16
Abstract
No abstract record available.
Inventors
- 👤 James C Kauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:00
CPC Classifications
C; C07; C07C; C07C61/00; C07C61/16; C07C61/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
1,4 DI(METHOXYCARBONYL) BICYCLO 2.2.2!OCT-2-ENE5,6-DICARBOXYLIC ANHYDRIDE.
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |