US2930671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing cuprammonium cellulose articles
Assignee: JP Bemberg AG
•
Filing: 1957-05-07
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Granted: 1960-03-29
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Expires: 1977-05-07
Abstract
No abstract record available.
Inventors
- 👤 Frind Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:06
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/02; D01F2/04; C; C10; C10M; C10M2201/00; C10M2201/10; C10M2201/102; C10M2201/103; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/129; C10M2207/14; C10M2207/141; C10M2207/22; C10M2207/28; C10M2207/32; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/101; C10M2209/102; C10M2219/00; C10M2219/04; C10M2219/044; C10M2227/00; C10M2227/09; C10N; C10N2010/00; C10N2010/06; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN A PROCESS FOR THE PRODUCTION OF CELLULOSE ARTICLES SUCH AS FILMENTS AND FILMS FROM A CUPRAMMONIUM CELLULOSE SPINNING SOLUTION, THE IMPROVEMENT WHICH COMPRISE: EXTRUDING A CUPRAMMONIUM SPINNING SOLUTION IN AN AQUEOUS SPIN BATH WHICH CONTAINS (1) A SETTING AGENT SELECTED FROM AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ALKALI METAL AND ALKALINE EARTH METAL SALTS IN A QUANTITY SUFFICIENT TO SET THE EXTRUDED SPINNING SOLUTION, (2) FROM 2 UP TO ABOUT 8 MOLS/LITER OF FREE AMMONIA, AND (3) AN AMMONIA COMPLEX-FORMING METAL SALT, SAID AMMONIA AND SAID AMMONIA COMPLEX-FORMING METAL SALT BEING PRESENT IN A QUANTITY SUFFICIENT TO PREVENT SUBSTANTIAL SEPARATION OF CELLULOSE FROM THE EXTRUDED CUPRAMMONIUM CELLULOSE SPINNING SOLUTION, AND STRETCHING THE EXTRUDED AND COAGULATED PRODUCT PRIOR TO SEPARATING THE CELLULOSE THEREFROM.
Claim 2
Dependent Claim
126 words
IN A PROCESS FOR THE PRODUCTION OF CELLULOSE ARTICLES SUCH AS FILMENTS AND FILMS FROM A CUPRAMMONIUM CELLULOSE SPINNING SOLUTION, THE IMPROVEMENT WHICH COMPRISE: EXTRUDING A CUPRAMMONIUM SPINNING SOLUTION IN AN AQUEOUS SPIN BATH WHICH CONTAINS (1) A SETTING AGENT SELECTED FROM AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ALKALI METAL AND ALKALINE EARTH METAL SALTS IN A QUANTITY SUFFICIENT TO SET THE EXTRUDED SPINNING SOLUTION, (2) FROM 2 UP TO ABOUT 8 MOLS/LITER OF FREE AMMONIA, AND (3) AN AMMONIA COMPLEX-FORMING METAL SALT, SAID AMMONIA AND SAID AMMONIA COMPLEX-FORMING METAL SALT BEING PRESENT IN A QUANTITY SUFFICIENT TO PREVENT SUBSTANTIAL SEPARATION OF CELLULOSE FROM THE EXTRUDED CUPRAMMONIUM CELLULOSE SPINNING SOLUTION, AND STRETCHING THE EXTRUDED AND COAGULATED PRODUCT PRIOR TO SEPARATING THE CELLULOSE THEREFROM.
References Cited (Backward Citations)
US2319428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |