US3852338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-substituted phenylalanine derivatives
Assignee: F Hoffmann La Roche AG
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Filing: 1971-10-21
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Granted: 1974-12-03
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Expires: 1991-10-21
Abstract
Abstract Phenylalanine derivatives which are N-substituted with a carbonyl, thio, or sulfonyl substituent useful as hypotensive, anti-pyretic and anti-parkinson agents and processes for their preparation from phenylalanine including intermediates in these processes.
Inventors
- 👤 A Kaiser
- 👤 W Koch
- 👤 M Scheer
- 👤 U Wolcke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:48
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/04; C07C275/20; C07C275/24; C07C235/00; C07C235/02; C07C235/04; C07C235/12; C07F; C07F5/00; C07F5/02; C07F5/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
N-((O-NITROPHENYL)-THIO)-L-DOPA OR SALTS THEREOF WITH PHARMACEUTICALLY ACCEPTABLE ACIDS OR BASES.
Claim 2
Dependent Claim
10 words
N-((O-NITROPHENYL)-THIO)-L-DOPA OR SALTS THEREOF WITH PHARMACEUTICALLY ACCEPTABLE ACIDS OR BASES.
Claim 3
Dependent Claim
12 words
The compound of claiam 1 wherein said compound is N-((o-nitrophenyl)-thio)-L-dopa dicyclohexylamine salt.
Claim 4
Dependent Claim
12 words
The compound of claiam 1 wherein said compound is N-((o-nitrophenyl)-thio)-L-dopa dicyclohexylamine salt.
References Cited (Backward Citations)
US2948714A
Cited
US3297737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |