Patent US3464850A successfully refreshed from Google Patents.
US2925641A
Expired / Lapsed
US
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Method for processing cellulose ester yarns
Assignee: Deering Milliken Research Corp
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Filing: 1956-02-09
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Granted: 1960-02-23
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Expires: 1976-02-09
Abstract
No abstract record available.
Inventors
- 👤 Cyril G Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:45
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/10; Y; Y10; Y10S; Y10S425/00; Y10S425/017
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR ELASTICIZING CONTINUOUS FILAMENT CELLULOSE ESTER YARNS WHICH COMPRISES TREATING THE YARN, FOR A TIME SUFFICIENT TO INCREASE ITS ELONGATION TO BREAK BUT INSUFFICIENT TO SEVERLY REDUCE THE STRENGTH OF THE YARN, WITH AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF NON-OXIDIZING INORGANIC ACIDS, SALTS THEREOF WITH POLUVALENT METALS AND MIXTURES OF SAID SALTS AND SAID ACIDS, WASHING THE YARN UNTIL IT IS SUBSTANTIALLY FREE OF SOLUTION, HEATING THE YARN TO A TEMPERATURE OF AT LEAST ABOUT 200*F. BUT NOT ABOVE ITS STICKING TEMPERATURE, AND PASSING THE HEATED YARN,
Claim 2
Dependent Claim
95 words
A PROCESS FOR ELASTICIZING CONTINUOUS FILAMENT CELLULOSE ESTER YARNS WHICH COMPRISES TREATING THE YARN, FOR A TIME SUFFICIENT TO INCREASE ITS ELONGATION TO BREAK BUT INSUFFICIENT TO SEVERLY REDUCE THE STRENGTH OF THE YARN, WITH AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF NON-OXIDIZING INORGANIC ACIDS, SALTS THEREOF WITH POLUVALENT METALS AND MIXTURES OF SAID SALTS AND SAID ACIDS, WASHING THE YARN UNTIL IT IS SUBSTANTIALLY FREE OF SOLUTION, HEATING THE YARN TO A TEMPERATURE OF AT LEAST ABOUT 200*F. BUT NOT ABOVE ITS STICKING TEMPERATURE, AND PASSING THE HEATED YARN,
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) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |