US3564009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 1-acylindole derivatives
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1966-12-28
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Granted: 1971-02-16
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Expires: 1986-12-28
Abstract
Abstract A PROCESS FOR THE PREPARATION OF CERTAIN N-ACYLINDOLES BY THE REACTION OF AN N''-ACYLHYDRAZINE WITH A KETONE COMPOUND.
Inventors
- 👤 Hisao Yamamoto
- 👤 Masaru Nakao
- 👤 Toshio Atsumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:13
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/12; C07D209/08; C07D209/14
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |