US3575957A
Expired / Lapsed
US
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Method for improving the dry state tinctorial strength of a water-soluble dye
Assignee: Honeywell International Inc
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Filing: 1967-08-21
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Granted: 1971-04-20
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Expires: 1987-08-21
Abstract
Abstract THE METHOD INVOLVES INTIMATELY CONTACTING A WATER SOLUBLE DYE WITH AN INERT, WATER SOLUBLE, LOW BOILING ORGANIC SOLVENT AND THEN EVAPORATING THE SOLVENT. THE TREATMENT MAY BE APPLIED TO DYE WHICH IS IN SUBSTANTIALLY DRY, GRANULAR FORM AND TO DYE IN THE FORM OF AN AQUEOUS MIXTURE. DYES TREATED IN THIS MANNER HAVE GREATLY IMPROVED TINCTORIAL STRENGTH IN THE DRY STATE AND THEREFORE THIS PROCESS IS PARTICULARLY USEFUL FOR DYES WHICH ARE USED TO COLOR DYE MIXES.
Inventors
- 👤 Walter R Demler
- 👤 Percy Perletz
- 👤 James R Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:03
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0072; A; A23; A23G; A23G3/00; A23G3/34; A23G3/346; A23L; A23L5/00; A23L5/40; A23L5/42; A23L5/47; C09B67/0001; C09B67/0014; A23G2200/00
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |