US2821532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of carbonylic radicals in indolyl-3 compounds
Assignee: Pharmacia and Upjohn Co
•
Filing: 1955-04-11
•
Granted: 1958-01-28
•
Expires: 1975-04-11
Abstract
No abstract record available.
Inventors
- 👤 William C Anthony
- 👤 Szmuszkovicz Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:33
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/14; C07D209/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
IN A PROCESS FOR THE PREPARATION OF 1-HYDRO-3(AMINO-1-HYDROXYHYDROCARBYL)-INDOLES INCLUDING SALTS THEREOF, THE STEP OF REDUCING WITH SODIUM BOROHYDRIDE A COMPOUND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
24 words
IN A PROCESS FOR THE PREPARATION OF 1-HYDRO-3(AMINO-1-HYDROXYHYDROCARBYL)-INDOLES INCLUDING SALTS THEREOF, THE STEP OF REDUCING WITH SODIUM BOROHYDRIDE A COMPOUND HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2692882A
Cited
US2708197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |