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Patent US3467645A successfully refreshed from Google Patents.
US3467645A
Expired / Lapsed
US
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Water-soluble disazo dyestuffs
Assignee: Durand and Huguenin AG
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Filing: 1964-11-06
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Granted: 1969-09-16
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Expires: 1984-11-06
Abstract
No abstract record available.
Inventors
- 👤 Heinz Keller
- 👤 Hans Grossmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:42
CPC Classifications
C; C09; C09B; C09B35/00; C09B45/00; C09B45/02; C09B45/24; C09B45/48
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) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |