US3992391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,3-Disubstituted thiourea compounds and preparation thereof
Assignee: Sumitomo Pharma Co Ltd
•
Filing: 1972-08-16
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Granted: 1976-11-16
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Expires: 1992-08-16
Abstract
Abstract 1,3-Disubstituted thiourea compounds represented by the following formula: R-HNCNH-R' PARALLEL S and their pharmaceutically acceptable acid addition salts which are useful especially for prevention and treatment of hypoxemia and further various diseases caused by hypoxia in local tissues, and process for the preparation of the present compounds set forth above and pharmaceutical composition containing the present compounds as an essential active ingredient.
Inventors
- 👤 Hitoshi Uno
- 👤 Junji Nakano
- 👤 Toshiaki Kadokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:22
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/75
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
8 words
1-(3'-Pyridyl)-3-(1',1'-dimethyl-2'hydroxyethyl)thiourea or its pharmaceutically acceptable acid addition salt.
Claim 2
Dependent Claim
8 words
1-(3'-Pyridyl)-3-(1',1'-dimethyl-2'hydroxyethyl)thiourea or its pharmaceutically acceptable acid addition salt.
Claim 3
Dependent Claim
8 words
1-(3'-Pyridyl)-3-(2'-hydroxypropyl)thiourea or its pharmaceutically acceptable acid addition salt.
Claim 4
Dependent Claim
8 words
1-(3'-Pyridyl)-3-(2'-hydroxypropyl)thiourea or its pharmaceutically acceptable acid addition salt.
Claim 5
Dependent Claim
8 words
1-(3'-Pyridyl)-3-(3'-carboxypropyl)thiourea or its pharmaceutically acceptable acid addition salt.
Claim 6
Dependent Claim
8 words
1-(3'-Pyridyl)-3-(3'-carboxypropyl)thiourea or its pharmaceutically acceptable acid addition salt.
References Cited (Backward Citations)
US2657234A
Cited
US3412098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |