US3672817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylene chlorohydrin,oxide or carbonate modified sulfonated lignins in a disperse or vat dye cake
Assignee: Westvaco Corp
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Filing: 1970-12-14
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Granted: 1972-06-27
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Expires: 1990-12-14
Abstract
Abstract DYESTUFF COMPOSITIONS COMPRISING AN ADMIXTURE OF A DYE CAKE, I.E., DISPERSE DYES AND VAT DYES, AND UP TO 75% BY WEIGHT OF AN IMPROVED SULFONATED LIGNIN SURFACTANT. THE IMPROVED SULFONATED LIGNIN SURFACTANT IS THE HYDROXYALKYLATED ADDUCT MADE BY REACTING WITH LIGNIN UP TO 20 MOLES, PREFERABLY FROM 1 TO 10 MOLES (PER 1000 GRAMS OF LIGNIN), OF A REACTANT SUCH AS AN ALKYLENE OXIDE, A HALOGEN-CONTAINING ALKYL ALCOHOL OR AN ALKYLENE CARBONATE. THE PREFERRED REACTANTS INCLUDE ETHYLENE OXIDE AND 2-CHLOROETHANOL. THESE IMPROVED SULFONATED LIGNIN ADDUCTS ARE LIGHTER IN COLOR, AND LESSEN OR ELIMINATE FIBER STAINING, DIAZO DYE REDUCTION AND FOAMING PROBLEMS.
Inventors
- 👤 Sten I Falkehag
- 👤 Howard H Moorer
- 👤 Carl W Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:22
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/60; D06P1/613; C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0085; D06P1/16; D06P1/46; D06P1/62; D06P1/621; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |