Patent FR1196263A successfully refreshed from Google Patents.
US2621187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of tryptophane and derivatives thereof
Assignee: Eli Lilly and Co
•
Filing: 1950-10-06
•
Granted: 1952-12-09
•
Expires: 1970-10-06
Abstract
No abstract record available.
Inventors
- 👤 Reuben G Jones
- 👤 Edmund C Kornfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:45
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18; C07D209/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A METHOD OF SYNTHESIZING TRYCTOPHANE AND DERIVATIVES THEREOF WHICH COMPRISES REACTING UNDER ALKALINE CONDITIONS A COMPOUND REPRESENTED BY THE FORMULA
Claim 2
Independent Claim
20 words
A METHOD OF SYNTHESIZING TRYCTOPHANE AND DERIVATIVES THEREOF WHICH COMPRISES REACTING UNDER ALKALINE CONDITIONS A COMPOUND REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
US2447545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |