US3689506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzofuran diamidine compounds
Assignee: Hoechst AG
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Filing: 1970-04-27
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Granted: 1972-09-05
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Expires: 1990-04-27
Abstract
Abstract New diamidine compounds having trypanocidal action and corresponding to the general formula 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
2026-11-07 23:29
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: 3
Claim 1
Independent Claim
8 words
5-amidino-2-(4''-amidinophenyl)-benzofurane and pharmaceutically acceptable acid addition salts thereof.
Claim 2
Dependent Claim
8 words
5-amidinO-3-methyl-2-(4''-amidinophenyl-benzofurane and pharmaceutically acceptable acid addition salts thereof.
Claim 3
Dependent Claim
8 words
6-amidino-2-(4''-amidinophenyl)-benzofurane and pharmaceutically acceptable acid addition salts thereof.
References Cited (Backward Citations)
FR1502346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |