US3497512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet radiation protective phthalazone derivatives
Assignee: Sandoz AG
•
Filing: 1966-10-10
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Granted: 1970-02-24
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Expires: 1986-10-10
Abstract
No abstract record available.
Inventors
- 👤 Kurt Hofer
- 👤 Alfred Schilli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:24
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/30; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3462; C08K5/3465
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2874156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |