Patent US2825625A successfully refreshed from Google Patents.
US2825625A
Expired / Lapsed
US
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Manufacture of cellulose acetate textile materials
Assignee: Acordis UK Ltd
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Filing: 1955-07-15
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Granted: 1958-03-04
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Expires: 1975-07-15
Abstract
No abstract record available.
Inventors
- 👤 Hill Frank Brentnall
- 👤 Downing John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:35
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR THE MANUFACTURE OF WET SPUN CELLULOSE ACETATE TEXTILE MATERIALS RESISTANT TO THE DEVELOPMENT OF DIFFERENTIAL LUSTRE, WHICH COMPRISES EXTRUDING AN ACETONE SOLUTION OF CELLULOSE ACETATE INTO A COAGULATING BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF DIETHYLENE GYLCOL DIACETATE, DRAWING THE FILAMENTS SO PRODUCED FROM THE COAGULATING BATH AS A YARN UNDER A TENSION SUFFUCIENT TO GIVE THEM THE DINIER REQUIRED IN THE FINAL PRODUCT, SUBJECTING THE YARN AT THE SAME FILAMENT DINIER TO THE ACTION OF NONOHYDRIC LOWER ALIPHATIC ALCOHOL SELECTED FROM THE GROUP WHICH CONSISTS OF ETHYL AND ISOPROPYL ALCOHOLS OF CENTRATION AT LEAST 85% AT A TEMPERATURE BETWEEN 20* AND 60*C., AND SUBSEQUENTLY REMOVING THE ALCOHOL FROM THE YARN.
Claim 2
Dependent Claim
115 words
A PROCESS FOR THE MANUFACTURE OF WET SPUN CELLULOSE ACETATE TEXTILE MATERIALS RESISTANT TO THE DEVELOPMENT OF DIFFERENTIAL LUSTRE, WHICH COMPRISES EXTRUDING AN ACETONE SOLUTION OF CELLULOSE ACETATE INTO A COAGULATING BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF DIETHYLENE GYLCOL DIACETATE, DRAWING THE FILAMENTS SO PRODUCED FROM THE COAGULATING BATH AS A YARN UNDER A TENSION SUFFUCIENT TO GIVE THEM THE DINIER REQUIRED IN THE FINAL PRODUCT, SUBJECTING THE YARN AT THE SAME FILAMENT DINIER TO THE ACTION OF NONOHYDRIC LOWER ALIPHATIC ALCOHOL SELECTED FROM THE GROUP WHICH CONSISTS OF ETHYL AND ISOPROPYL ALCOHOLS OF CENTRATION AT LEAST 85% AT A TEMPERATURE BETWEEN 20* AND 60*C., AND SUBSEQUENTLY REMOVING THE ALCOHOL FROM THE YARN.
References Cited (Backward Citations)
US2147641A
Cited
US2142389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |