Patent US3686202A successfully refreshed from Google Patents.
US3686202A
Expired / Lapsed
US
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Triazolyl-coumarins
Assignee: Novartis Corp
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Filing: 1969-07-08
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Granted: 1972-08-22
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Expires: 1989-07-08
Abstract
Abstract COUMARINS SUBSTITUTED IN 3-POSITION AND CONTAINING 1,2, 3-TRIAZOLYL-(4) IN 7-POSITION ARE USEFUL OPTICAL BRIGHTENERS. A SPECIFIC EMBODIMENT IS 2-PHENYL-4-(3PHENYL-COUMARINYL-(7))-5-METHYL-V-TRIAZOLE.
Inventors
- 👤 Rudolf Kirchmayr
- 👤 Jean Rody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:00
CPC Classifications
C; C07; C07D; C07D405/00; C07D405/02; C07D405/04
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |