US3556708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose dyeing with dichloroacrylamide quaternized reactive dyes
Assignee: GAF Corp
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Filing: 1965-12-17
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Granted: 1971-01-19
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Expires: 1985-12-17
Abstract
Abstract A WATER SOLUBLE DYESTUFF CONTAINING AT LEAST ONE QUATERNIZED FIBER-REACTIVE A,B-DICHLORACRYLAMIDE GROUP OF THE FORMULA NH-CO-CCI=CH-NR1R2R3CL WHEREIN R1, R2 AND R3 REPRESENT MONOVALENT ALIPHATIC RADICALS OF NO MORE THAN ABOUT 8 CARBON ATOMS OR AT LEAST TWO OF R1, R2 AND R3 TAKEN TOGETHER, REPRESENT THE ATOMS NECESSARY TO FORM WITH THE DEPICTED ADJACENT N ATOM A HETEROCYCLIC RING, AND A METHOD OF DYEING THEREWITH.
Inventors
- 👤 David I Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:09
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/001; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917; Y10S8/918; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 0
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |