Patent US1928943A successfully refreshed from Google Patents.
Patent US2599371A successfully refreshed from Google Patents.
US2599371A
Expired / Lapsed
US
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Printing with onium dyestuffs and buffer mixtures
Assignee: Imperial Chemical Industries Ltd
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Filing: 1948-06-30
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Granted: 1952-06-03
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Expires: 1968-06-30
Abstract
No abstract record available.
Inventors
- 👤 Chadderton Tom
- 👤 Thornton Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:43
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/001; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR THE PRODUCTION OF COLORED PATTERNED EFFECTS ON ABSORPTIVE FIBROUS MATERIALS BY LOCAL APPLICATION OF A DYESTUFF CONTAINING A WATER-SOLUBILIZING GROUP SELECTED FROM THE CLASS CONSISTING OF QUATERNARY AMMONIUM, TERTIARY SULFONIUM AND ISOTHIOURONIUM SALT GROUPS, WHICH COMPRISES APPLYING SAID DYESTUFF LOCALLY TO SAID MATERIAL IN THE PRESENCE OF A BUFFERED COMPOSITION COMPRISING A MIXTURE OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF WEAK ACIDS AND ACID SALTS AND AN ALKALINE SALT OF A WEAK ACID, WHICH COMPOSITION ON HEATING CHANGES FROM A WEAKLY ACID TO A WEAKLY ALKALINE STATE, AND THEREAFTER HEATING SAID MATERIAL TO CONVERT SAID COMPOSITION TO ITS ALKALINE STATE AND FIX SAID DYESTUFF.
Claim 2
Dependent Claim
109 words
A PROCESS FOR THE PRODUCTION OF COLORED PATTERNED EFFECTS ON ABSORPTIVE FIBROUS MATERIALS BY LOCAL APPLICATION OF A DYESTUFF CONTAINING A WATER-SOLUBILIZING GROUP SELECTED FROM THE CLASS CONSISTING OF QUATERNARY AMMONIUM, TERTIARY SULFONIUM AND ISOTHIOURONIUM SALT GROUPS, WHICH COMPRISES APPLYING SAID DYESTUFF LOCALLY TO SAID MATERIAL IN THE PRESENCE OF A BUFFERED COMPOSITION COMPRISING A MIXTURE OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF WEAK ACIDS AND ACID SALTS AND AN ALKALINE SALT OF A WEAK ACID, WHICH COMPOSITION ON HEATING CHANGES FROM A WEAKLY ACID TO A WEAKLY ALKALINE STATE, AND THEREAFTER HEATING SAID MATERIAL TO CONVERT SAID COMPOSITION TO ITS ALKALINE STATE AND FIX SAID DYESTUFF.
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) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |