Patent US3331875A successfully refreshed from Google Patents.
US3331875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of enamines
Assignee: Eastman Kodak Co
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Filing: 1964-04-15
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Granted: 1967-07-18
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Expires: 1984-04-15
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Strickland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:13
CPC Classifications
C; C07; C07C; C07C217/00; C07C217/54; C07C217/56; C07C217/58; C07C209/00; C07C209/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A PROCESS FOR PREPARING AN ENAMINE OF THE FORMULA:
Claim 2
Dependent Claim
9 words
A PROCESS FOR PREPARING AN ENAMINE OF THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |