US2825734A
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: 1958-03-04
•
Expires: 1975-04-11
Abstract
No abstract record available.
Inventors
- 👤 Merrill E Speeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:17
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18; C07D209/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
IN A PROCESS FOR THE PREPARATION OF 3-(2-AMINO-1HYDROXYETHYL)-INDOLE INCLUDING SALTS THEREOF, THE STEP OF REDUCING WITH LITHIUM ALUMINUM HYDRIDE A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
24 words
IN A PROCESS FOR THE PREPARATION OF 3-(2-AMINO-1HYDROXYETHYL)-INDOLE INCLUDING SALTS THEREOF, THE STEP OF REDUCING WITH LITHIUM ALUMINUM HYDRIDE A COMPOUND HAVING THE FORMULA:
References Cited (Backward Citations)
US2305501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |