Patent US3757011A successfully refreshed from Google Patents.
US3757011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenanthrotriazolyl derivatives
Assignee: Sandoz AG
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Filing: 1971-04-09
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Granted: 1973-09-04
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Expires: 1991-04-09
Abstract
Abstract PHENANTHROTRIAZOLYL DERIVATIVES OF FORMULA WHEREIN R1 IS H, CL, F, CN, COOH, SO3H, OPTIONALLY SUBSTITUTED AMIDE OR ESTER OF COOH OR SO3H, ALKYL-SO2 OR ARYL-SO2, R2 IS H, CL, F, CN, OPTIONALLY SUBSTITUTED ALKYL OR ARYL, COOH, SO3H, OPTIONALLY SUBSTITUTED SO2-NH2, R3 IS H OR ALKYL AND R4 IS H, SO3H, OPTIONALLY SUBSTITUTED AMIDE OR ESTER OF SO3H. 3-R1-PHENYL),R4-2H-PHENANTHRO(9,10-D)TRIAZOLE 2-(4-(R2-C6H4-(5-R3-2H-1,2,3-TRIAZOL-2,4-YLENE)-CH=CH-),
Inventors
- 👤 F Fleck
- 👤 H Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:32
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/16; C09; C09B; C09B23/00; C09B23/14; C09B43/00; C09B43/06
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |