US2843448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing and printing of cellulose esters and of linear aromatic polyesters with mono-sulfonated anthraquinones
Assignee: Saul and Co
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Filing: 1955-12-29
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Granted: 1958-07-15
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Thummel Ludwig
- 👤 Metzger Emil
- 👤 Guenthard Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:57
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/0048; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A PROCESS FOR DYEING AND PRINTING ARTICLES OF CELLULOSE ESTERS AND OF LINEAR AROMATIC POLYESTERS, WHICH COMPRISES BRINGING SAID ARTICLES INTO CONTACT WITH A WATERSOLUBLE ACID ANTHRAQUINONE DYESTUFF CONTAINING A SULFONIC ACID GROUP IN THE 2-POSITION OF THE ANTHRAQUINONE NUCLEUS AS THE SOLE WATER-SOLUBILIZING GROUP, IN AQUEOUS MEDIUM AND AT RAISED TEMPERATURE AND IN THE PRESENCE OF A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF ZINCFORMALDEHYDE-SULFOXYLATE, SODIUM-FORMADLEHYDE-BISULFITE, SODIUM-FORMALDEHYDE-SULFOXYLATE, SODIUM-CELLULOSE-XANTHATE, A MIXTURE OF SODIUM HYPOSULFITE AND AN ALKALI METAL CARBONATE, A MIXTURE OF A REDUCING SUGAR AND AN ALKALI METAL CARBONATE, A MIXTURE OF A REDUCING SUGAR AND AN ALKALI METAL HYDROXIDE AND A MIXTURE OF ZINC DUCT AND AN ALKALI METAL CARBONATE, WHEREBY THE 2-POSITIONED SULFONIC ACID GROUP IS SPLIT OFF AND THE DYESTUFF IS DRAWN ONTO THE SAID ARTICLES IN INSOLUBILIZED FORM AND IN A STATE OF MOLECULAR SUBDIVISION.
Claim 2
Dependent Claim
141 words
A PROCESS FOR DYEING AND PRINTING ARTICLES OF CELLULOSE ESTERS AND OF LINEAR AROMATIC POLYESTERS, WHICH COMPRISES BRINGING SAID ARTICLES INTO CONTACT WITH A WATERSOLUBLE ACID ANTHRAQUINONE DYESTUFF CONTAINING A SULFONIC ACID GROUP IN THE 2-POSITION OF THE ANTHRAQUINONE NUCLEUS AS THE SOLE WATER-SOLUBILIZING GROUP, IN AQUEOUS MEDIUM AND AT RAISED TEMPERATURE AND IN THE PRESENCE OF A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF ZINCFORMALDEHYDE-SULFOXYLATE, SODIUM-FORMADLEHYDE-BISULFITE, SODIUM-FORMALDEHYDE-SULFOXYLATE, SODIUM-CELLULOSE-XANTHATE, A MIXTURE OF SODIUM HYPOSULFITE AND AN ALKALI METAL CARBONATE, A MIXTURE OF A REDUCING SUGAR AND AN ALKALI METAL CARBONATE, A MIXTURE OF A REDUCING SUGAR AND AN ALKALI METAL HYDROXIDE AND A MIXTURE OF ZINC DUCT AND AN ALKALI METAL CARBONATE, WHEREBY THE 2-POSITIONED SULFONIC ACID GROUP IS SPLIT OFF AND THE DYESTUFF IS DRAWN ONTO THE SAID ARTICLES IN INSOLUBILIZED FORM AND IN A STATE OF MOLECULAR SUBDIVISION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |