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US3511833A
Expired / Lapsed
US
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Process for making a new crystalline form of a bis-triazinylamino stilbene optical brightener
Assignee: Novartis Corp
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Filing: 1967-05-12
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Granted: 1970-05-12
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Expires: 1987-05-12
Abstract
No abstract record available.
Inventors
- 👤 Christopher J Tscharner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:23
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/60; D06L4/664
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2762801A
Cited
FR1361065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |