Patent US3635944A successfully refreshed from Google Patents.
US3635944A
Expired / Lapsed
US
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Highly water soluble disazo dyestuffs
Assignee: Honeywell International Inc
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Filing: 1969-05-12
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Granted: 1972-01-18
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Expires: 1989-05-12
Abstract
Abstract HIGHLY WATER SOLUBLE PHENYLAZOPHENYLAZONAPHTHYL TRI(LITHIUM SULFONATE) DYESTUFF ADAPTED TO DYE CELLULOSIC FIBERS BRIGHT, LIGHT-FAST VIOLET SHADES.
Inventors
- 👤 Alvin C Litke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:13
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/02; C09B31/00; C09B31/02; C09B31/08; Y; Y10; Y10S; Y10S534/00; Y10S534/01; Y10S8/00; Y10S8/916; Y10S8/919
Claims Analysis
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |