US2535098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gamma-valerolactone and gammabutyrolactone as dyeing assistants for cellulose ester and ether yarns and fabrics
Assignee: Monsanto Chemicals Ltd
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Filing: 1947-06-13
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Granted: 1950-12-26
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Expires: 1967-06-13
Abstract
No abstract record available.
Inventors
- 👤 Seth U Shorey
- 👤 George W Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:08
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/34; D06P3/40; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P1/65125; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
122 words
THE PROCESS OF DYEING A SYNTHETIC TEXTILE IN THE FORM OF YARNS AND FABRICS MADE OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTERS AND WATER-INSOLUBLE CELLULOSE ETHERS COMPRISING CONTACTING SAID TEXTILE WITH A DYE LIQUOR COMPRISING A DYESTUFF WHICH WHEN APPLIED FROM SAID DYE LIQUOR HAS AN AFFINITY FOR SAID TEXTILE, 5-35% BY VOLUME OF A LACTONE SELECTED FROM THE GROUP CONSISTING OF GAMMA-VALEROLACTONE AND GAMMA-BUTYROLACTONE, AND WATER, SAID DYE LIQUOR BEING MAINTAINED AT A TEMPERATURE IN THE RANGE OF 20-45* C., AND SUBSEQUENTLY WASHING THE TEXTILE SUBSTANTIALLY FREE FROM RESIDUAL DYE LIQUOR, THE PERIOD OF TIME FROM THE INITIAL CONTACT OF SAID TEXTILE WITH SAID DYE LIQUOR UNTIL THE WASHING OF SAID TEXTILE BEING LESS THAN 50 SECONDS.
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) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |