US2702231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dextran filament manufacture
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1951-08-21
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Granted: 1955-02-15
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Expires: 1971-08-21
Abstract
No abstract record available.
Inventors
- 👤 George L Deniston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:21
CPC Classifications
D; D01; D01F; D01F9/00; D01D; D01D5/00; D01D5/04; D01F2/00; D01F2/24; D01F2/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A PROCESS OF PRODUCING A FILAMENT COMPRISING THE STEPS OF EXTRUDING A VISCOUS MASS CONTAINING FROM 80 TO 90 PARTS BY WEIGHT OF A WATER-INSOLUBLE BENZYL ETHER OF DEXTRAN, FROM 10 TO 20 PARTS BY WEIGHT OF LOW VISCOSITY NITROCELLULOSE AND A SOLVENT FOR THE ETHER AND NITROCELLULOSE THROUGH A FILAMENT-FORMING DEVICE TO FORM A FILAMENT, PASSING THE FILAMENT, AS IT PROCEEDS FROM THE FILAMENT, FORMING DEVICE, THROUGH A HOT AIR BLAST TO EVAPORATE SAID SOLVENT COMPLETELY THEREFROM, AND WINDING THE FILAMENT ON A ROTATING DRUM.
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |