Patent US2621103A successfully refreshed from Google Patents.
US2621103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of artificial filaments and similar products from cellulose xanthogenates
Assignee: TEXTILE and CHEM RES CO Ltd
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Filing: 1951-02-16
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Granted: 1952-12-09
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Expires: 1971-02-16
Abstract
No abstract record available.
Inventors
- 👤 Drisch Nicolas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:34
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
PROCESS FOR THE PRODUCTION OF FILAMENTS AND SIMILAR PRODUCTS FROM CELLULOSE XANTHOGENATE WHICH COMPRISES EXTRUDING THROUGH A SPINNERET INTO AIR AT ROOM TEMPERATURE A DISPERSION OF CELLULOSE XANTHOGENATE IN AQUEOUS CAUSTIC SODA, WHICH DISPERSION HAS A VISCOSITY OF AT LEAST 1000 POISES, A CELLULOSE CONTENT OF AT LEAST 6% AND A CAUSTIC SODA CONTENT OF 3-10%, THE VOLUME OF THE DISPERSING PHASE BEING INSUFFICIENT TO PRODUCE TOTAL HYDRATION OF THE MOLECULES AND THE DEGREE OF HYDRATION OF THE MOLECULES BEING SUBSTANTIALLY UNIFORM, STRETCHING THE PRODUCTS CONTINUOUSLY WITH THEIR PRODUCTION AND THEREAFTER REGENERATING THE CELLULOSE IN THE PRODUCTS.
Claim 2
Dependent Claim
97 words
PROCESS FOR THE PRODUCTION OF FILAMENTS AND SIMILAR PRODUCTS FROM CELLULOSE XANTHOGENATE WHICH COMPRISES EXTRUDING THROUGH A SPINNERET INTO AIR AT ROOM TEMPERATURE A DISPERSION OF CELLULOSE XANTHOGENATE IN AQUEOUS CAUSTIC SODA, WHICH DISPERSION HAS A VISCOSITY OF AT LEAST 1000 POISES, A CELLULOSE CONTENT OF AT LEAST 6% AND A CAUSTIC SODA CONTENT OF 3-10%, THE VOLUME OF THE DISPERSING PHASE BEING INSUFFICIENT TO PRODUCE TOTAL HYDRATION OF THE MOLECULES AND THE DEGREE OF HYDRATION OF THE MOLECULES BEING SUBSTANTIALLY UNIFORM, STRETCHING THE PRODUCTS CONTINUOUSLY WITH THEIR PRODUCTION AND THEREAFTER REGENERATING THE CELLULOSE IN THE PRODUCTS.
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) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |