US3560523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-substituted delta 1-pyrroline derivatives and method of preparation
Assignee: Produits Chimiques Pechiney Saint Gobain
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Filing: 1967-11-01
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Granted: 1971-02-02
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Expires: 1987-11-01
Abstract
Abstract 2-Y-1-PYRROLINE IN WHICH Y IS A SUBSTITUTED ALKYL GROUP IN WHICH THE SUBSTITUENT IS NITRO,CYANO, CARBONYL AND /OR ALKYL-CARBOXYL BY REACTION OF 2-ALKOXY $1-PYRROLINE WITH A LABILE HYDROGEN COMPOUND CONTAINING THE Y GROUP. THE INVENTION IS CONCERNED WITH THE PREPARATION OF 2SUBSTITUTED $1-PYRROLINE DERIVATIVES HAVING THE FORMULA
Inventors
- 👤 Andre Etienne
- 👤 Yves Correia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:38
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/20
Claims Analysis
Total Claims: 0
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |