Patent US3225125A successfully refreshed from Google Patents.
US3225125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming regenerated cellulose fibers
Assignee: FMC Corp
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Filing: 1962-08-28
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Granted: 1965-12-21
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Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Anderer
- 👤 Vinci Anthony P Da
- 👤 Thomas F Mchugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:25
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; D01D5/247; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE METHOD OF FORMING THIN-WALLED REGENERATED CELLULOSE FIBERS HAVING AN AVERAGE WALL THICKNESS NOT EXCEEDING ABOUT THREE MICRONS WHICH COMPRISES ADDING TO AN INCORPORATING IN VISCOE A SMALL AMOUNT OF A SURFACEACTIVE AGENT, MIXING A GAS INTO THE VISCOSE, VIGROUSLY AGITATING THE MIXTURE TO DISPERSE THE GAS IN THE VISCOSE AND FORM A UNIFORM, STABLE DISPERSION OF THE GAS IN THE FORM OF SMALL BUBBLES AND EXTRUDING THE VISCOSE INTO AN ACID BATH THROUGH AN ORIFICE HAVING A DIAMETER OF ABOUT TWICE THE AVERAGE DIAMETER OF THE BUBBLES AT ATMOSPHERIC PRESSURE.
Claim 2
Independent Claim
91 words
THE METHOD OF FORMING THIN-WALLED REGENERATED CELLULOSE FIBERS HAVING AN AVERAGE WALL THICKNESS NOT EXCEEDING ABOUT THREE MICRONS WHICH COMPRISES ADDING TO AN INCORPORATING IN VISCOE A SMALL AMOUNT OF A SURFACEACTIVE AGENT, MIXING A GAS INTO THE VISCOSE, VIGROUSLY AGITATING THE MIXTURE TO DISPERSE THE GAS IN THE VISCOSE AND FORM A UNIFORM, STABLE DISPERSION OF THE GAS IN THE FORM OF SMALL BUBBLES AND EXTRUDING THE VISCOSE INTO AN ACID BATH THROUGH AN ORIFICE HAVING A DIAMETER OF ABOUT TWICE THE AVERAGE DIAMETER OF THE BUBBLES AT ATMOSPHERIC PRESSURE.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |