Patent US2970880A successfully refreshed from Google Patents.
US2970880A
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Soluble vat dye printing compositions with heterocyclic solubilizing agents
Assignee: Wyeth Holdings LLC
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Filing: 1958-06-10
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Granted: 1961-02-07
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Expires: 1978-06-10
Abstract
No abstract record available.
Inventors
- 👤 Kaplan Earl
- 👤 Von Isaiah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:41
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/28; D06P1/44; D06P1/52; D06P1/5207; D06P1/5214; D06P1/5242; D06P1/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A SOLUBLE VAT DYE PRINTING COMPOSITION COMPRISING A SULFURIC ACID ESTER SALT OF A LEUCO VAT DYE MORE THAN 0935 PART, PER PART OF SAID ESTER SALT, OF A COMPOUND CHOSEN FROM THE GROUP CONSISNTING OF (1) POLYMERS OF 1,3BIS-HYDROXYMETHTL-2-IMIDAZOLONE HAVING A MOLECULAR WHEREIN N IS A WHOLE NUMBER OF 10 TO ABOUT 100, R IS PYRROLIDONE HAVING A MOLECULAR WEIGHT OF 20,000 TO 40,000.
Claim 2
Dependent Claim
65 words
A SOLUBLE VAT DYE PRINTING COMPOSITION COMPRISING A SULFURIC ACID ESTER SALT OF A LEUCO VAT DYE MORE THAN 0935 PART, PER PART OF SAID ESTER SALT, OF A COMPOUND CHOSEN FROM THE GROUP CONSISNTING OF (1) POLYMERS OF 1,3BIS-HYDROXYMETHTL-2-IMIDAZOLONE HAVING A MOLECULAR WHEREIN N IS A WHOLE NUMBER OF 10 TO ABOUT 100, R IS PYRROLIDONE HAVING A MOLECULAR WEIGHT OF 20,000 TO 40,000.
References Cited (Backward Citations)
US2265450A
Cited
US2903325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |