US2868818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha methyl phenylalanines
Assignee: Merck and Co Inc
•
Filing: 1953-12-15
•
Granted: 1959-01-13
•
Expires: 1973-12-15
Abstract
No abstract record available.
Inventors
- 👤 Iii Karl Pfister
- 👤 Gustav A Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:11
CPC Classifications
C; C07; C07C; C07C255/00; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D233/76; C07D233/78; C11; C11B; C11B5/00; C11B5/0042; C11B5/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULAS
Claim 2
Dependent Claim
12 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULAS
References Cited (Backward Citations)
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Cited
US1861458A
Cited
DE752328C
Cited
US2561284A
Cited
US2605282A
Cited
US2562198A
Cited
US2650242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |