US3652591A
Expired / Lapsed
US
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Diamidine compounds
Assignee: Hoechst AG
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Filing: 1968-05-22
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Granted: 1972-03-28
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Expires: 1988-05-22
Abstract
Abstract DIAMIDINE COMPOUNDS HAVING TRYPANOCIAL ACTION AND CORRESPONDING TO THE GENERAL FORMULA (H2N-C(=NH)-PHENYLENE-C<(-X-((H2N-C(=NH)-)-1,2-PHENYLENE)- C(-R)=) IN WHICH R REPRESENTS HYDROGEN OR LOWER ALKYL, AND X REPRESENTS OXYGEN,-NH-OR-CH2-AND, SALTS OF THESE COMPOUNDS WITH INORGANIC OR ORGANIC ACIDS
Inventors
- 👤 Otto Dann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:26
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/79; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |