US3050775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning of cellulose film
Assignee: Onderzoekings Instituut Research
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Filing: 1960-03-24
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Granted: 1962-08-28
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Expires: 1980-03-24
Abstract
No abstract record available.
Inventors
- 👤 Levison Robert
- 👤 Hesselink Frans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:54
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/911; B29C48/03; B29C48/07; B29C48/08; B29C48/001; B29C48/0018
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD FOR WET SPINNING RIBBON-SHAPED PRODUCTS COMPRISING THE STEPS OF EXTRUDING A LIQUID SPINNING MASS VERTICALLY DOWNWARDLY THROUGH A CASTING DEVICE HAVING A CASTING SLIT EXTENDING INTO A COAGULATING MEDIUM, COMPLETELY ENCLOSING THE FRESHLY-EXTRUDED RIBBON-SHAPED PRODUCT IN A BODY OF COAGULATING MEDIUM, GUIDING THE EXTRUDED PRODUCT VERTICALLY DOWNWARDLY BY FLOWING THE COAGULATING MEDIUM IN THE DIRECTION OF SPINNING AT A SUFFICIENTLY HIGH RATE OF SPEED TO PRODUCE MOVEMENT IN THE RIBBON-SHAPED PRODUCT BY REASON OF FRICTIONAL INTERACTION BETWEEN THE COAGULATING MEDIUM AND THE RIBBONSHAPED PRODUCT, AND DEFLECTING THE COAGULATING MEDIUM AWAY FROM THE RIBBON-SHAPED PRODUCT WHILE SIMULTANEOUSLY ACCELERATING THE FLOW THEREOF.
Claim 2
Independent Claim
102 words
A METHOD FOR WET SPINNING RIBBON-SHAPED PRODUCTS COMPRISING THE STEPS OF EXTRUDING A LIQUID SPINNING MASS VERTICALLY DOWNWARDLY THROUGH A CASTING DEVICE HAVING A CASTING SLIT EXTENDING INTO A COAGULATING MEDIUM, COMPLETELY ENCLOSING THE FRESHLY-EXTRUDED RIBBON-SHAPED PRODUCT IN A BODY OF COAGULATING MEDIUM, GUIDING THE EXTRUDED PRODUCT VERTICALLY DOWNWARDLY BY FLOWING THE COAGULATING MEDIUM IN THE DIRECTION OF SPINNING AT A SUFFICIENTLY HIGH RATE OF SPEED TO PRODUCE MOVEMENT IN THE RIBBON-SHAPED PRODUCT BY REASON OF FRICTIONAL INTERACTION BETWEEN THE COAGULATING MEDIUM AND THE RIBBONSHAPED PRODUCT, AND DEFLECTING THE COAGULATING MEDIUM AWAY FROM THE RIBBON-SHAPED PRODUCT WHILE SIMULTANEOUSLY ACCELERATING THE FLOW THEREOF.
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) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |