US2616896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of tryptamine
Assignee: Pharmacia and Upjohn Co
•
Filing: 1949-03-24
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Granted: 1952-11-04
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Expires: 1969-03-24
Abstract
No abstract record available.
Inventors
- 👤 David I Weisblat
- 👤 Douglas A Lyttle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:35
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/14; C07D209/16; C07D209/18; C07D209/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
26 words
THE METHOD WHICH INCLUDES: SIMULTANEOUSLY HYDROLYZING AND DECARBOXYLATING A MONO ESTER OF ALPHA-NITRO-BETA-(3-INDOLE)PROPIONIC ACID TO FORM BETA-(3-INDOLE)NITROETHANE, THE REACTION BEING CARRIED OUT AT ABOUT ROOM TEMPERATURE.
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) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |