US4908465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted propane-phosphonous acid compounds
Assignee: Novartis Corp
•
Filing: 1988-06-07
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Granted: 1990-03-13
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Expires: 2008-06-07
Abstract
Abstract The compounds of the formula ##STR1## in which one of the groups R 1 , R 2 and R 3 represents hydrogen, C 1 - 8 -alkyl, C 3 - 6 -cycloalkyl, phenyl optionally substituted by halogeno, C 1 - 4 -alkyl, C 1 - 4 -alkoxy and/or trifluoromethyl, or C 7 - 10 -phenylalkyl optionally substituted in the phenyl moiety by halogeno, C 1 - 4 -alkyl, C 1 - 4 -alkoxy and/or trifluoromethyl, and the other two are hydrogen, or salts thereof. These compounds have valuable pharmaceutical properties.
Inventors
- 👤 John G. Dingwall
- 👤 Josef Ehrenfreund
- 👤 Roger G. Hall
- 👤 James Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:07
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/48; A; A61; A61P; A61P21/00; A61P25/00; A61P25/04; A61P25/24; A61P25/26; A61P25/28; C07F9/30; C07F9/32; C07F9/3205; C07F9/3211; C07F9/4808; C07F9/4816; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
2 words
Ethyl 2-(4-chlorophenyl)-3-nitropropyl(diethoxymethyl)phosphinate.
Claim 2
Dependent Claim
2 words
Ethyl 2-(4-chlorophenyl)-3-nitropropyl(diethoxymethyl)phosphinate.
Claim 3
Dependent Claim
2 words
Ethyl 2-phenyl-3-nitropropyl(diethoxymethyl)phosphinate.
Claim 4
Dependent Claim
2 words
Ethyl 2-phenyl-3-nitropropyl(diethoxymethyl)phosphinate.
Claim 5
Dependent Claim
2 words
Ethyl 2-(4-fluorophenyl)-3-nitropropyl(diethoxymethyl)phosphinate.
Claim 6
Dependent Claim
2 words
Ethyl 2-(4-fluorophenyl)-3-nitropropyl(diethoxymethyl)phosphinate.
Claim 7
Dependent Claim
2 words
Ethyl 2-(4-methylphenyl)-3-nitropropyl(diethoxymethyl)phosphinate.
Claim 8
Dependent Claim
2 words
Ethyl 2-(4-methylphenyl)-3-nitropropyl(diethoxymethyl)phosphinate.
Claim 9
Dependent Claim
2 words
Ethyl 2-(4-methoxyphenyl)-3-nitropropyl(diethoxymethyl)phosphinate.
Claim 10
Dependent Claim
2 words
Ethyl 2-(4-methoxyphenyl)-3-nitropropyl(diethoxymethyl)phosphinate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-12 | 1993-09-11 | 1994-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-12 | 1997-09-11 | 1998-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-12 | 2001-09-11 | 2002-03-13 | $7700.00 | Window Closed / Lapsed |