Patent US2758339A successfully refreshed from Google Patents.
US2758339A
Expired / Lapsed
US
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Extrusion of plasticized cellulose acetate
Assignee: Acordis UK Ltd
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Filing: 1952-11-20
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Granted: 1956-08-14
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Expires: 1972-11-20
Abstract
No abstract record available.
Inventors
- 👤 Allan John
- 👤 Wright Kenneth Edwin
- 👤 Shaw Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
PROCESS FOR MAKING ARTICLES BY EXTRUSION WHICH COMPRISES FEEDING A COMPOSITION HAVING A BASIS OF PLASTICIZED CELLULOSE ACETATE, SAID CELLULOSE ACETATE CONTAINING 52.5-55.5% OF COMBINED ACETIC ACID AND HAVING A VISCOSITY IN 6% BY WEIGHT SOLUTION IN ACETONE OF 30-48 C.P.S. AT 25* C., SAID COMPOSITION BEING IN PARTICULATE FORM, SUBSTANTIALLY FREE FROM ANY VOLATILE LIQUID AND CONTAINING 3-4%, BASED ON THE WEIGHT OF CELLULOSE ACETATE, OF RICINOLEIC ACID, INTO A HEATED CHAMBER AND EXTRUDING IT THEREFROM THROUGH AN APPROPRIATELY SHAPED ORIFICE INTO THE AIR, THE TEMPERATURE OF SAID CHAMBER BEING FROM 50-70* C. AT THE FEED POINT AND 20-30* C. AT THE EXTRUSION POINT, AND BEING 100-110*C. AT A POINT BETWEEN THE FEED POINT AND THE EXTRUSION POINT.
Claim 2
Dependent Claim
119 words
PROCESS FOR MAKING ARTICLES BY EXTRUSION WHICH COMPRISES FEEDING A COMPOSITION HAVING A BASIS OF PLASTICIZED CELLULOSE ACETATE, SAID CELLULOSE ACETATE CONTAINING 52.5-55.5% OF COMBINED ACETIC ACID AND HAVING A VISCOSITY IN 6% BY WEIGHT SOLUTION IN ACETONE OF 30-48 C.P.S. AT 25* C., SAID COMPOSITION BEING IN PARTICULATE FORM, SUBSTANTIALLY FREE FROM ANY VOLATILE LIQUID AND CONTAINING 3-4%, BASED ON THE WEIGHT OF CELLULOSE ACETATE, OF RICINOLEIC ACID, INTO A HEATED CHAMBER AND EXTRUDING IT THEREFROM THROUGH AN APPROPRIATELY SHAPED ORIFICE INTO THE AIR, THE TEMPERATURE OF SAID CHAMBER BEING FROM 50-70* C. AT THE FEED POINT AND 20-30* C. AT THE EXTRUSION POINT, AND BEING 100-110*C. AT A POINT BETWEEN THE FEED POINT AND THE EXTRUSION POINT.
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) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |