Patent US3547774A successfully refreshed from Google Patents.
US3547774A
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US
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Process for forming a solubilized stilbene dye and a process for forming colored paper therewith
Assignee: Novartis Corp
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Filing: 1967-06-30
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Granted: 1970-12-15
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Expires: 1987-06-30
Abstract
No abstract record available.
Inventors
- 👤 Robert Wallibald Johan Rebhahn
- 👤 Derek William Bannister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:36
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/28; C; C09; C09B; C09B56/00; C09B56/04; C09B56/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |