US4413141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-(Difluoromethyl)-2,5-diaminopentanoic acid
Assignee: MERREL TORAUDE ET Cie
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Filing: 1982-09-17
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Granted: 1983-11-01
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Expires: 2002-09-17
Abstract
Abstract This invention relates to 2-(difluoromethyl)-2,5-diaminopentanoic acid, or a pharmaceutically acceptable acid addition salt thereof, and to the methods for the preparation and use thereof.
Inventors
- 👤 Philippe Bey
- 👤 Michel Jung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:55
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/16; A; A61; A61K; A61K31/00; A61K31/16; A61K31/185; A61K31/19; A61K31/195; C07D; C07D211/00; C07D211/04; C07D211/68; C07D211/72; C07D211/74; C07D211/76; C07D223/00; C07D223/02; C07D223/06; C07D223/08; C07K; C07K5/00; C07K5/04; C07K5/06; C07K5/06191; A61K38/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
8 words
2-Difluoromethyl-2,5-diaminopentanoic acid, or a pharmaceutically acceptable salt thereof.
Claim 2
Dependent Claim
8 words
2-Difluoromethyl-2,5-diaminopentanoic acid, or a pharmaceutically acceptable salt thereof.
Claim 3
Dependent Claim
20 words
A compound as defined in claim 1 which is the (-)-isomer of 2-difluoromethyl-2,5-diaminopentanoic acid or a pharmaceutically acceptable salt thereof.
Claim 4
Dependent Claim
12 words
The compound of claim 1 or 2 which is the monohydrochloride salt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |