Patent US2902334A successfully refreshed from Google Patents.
US2902334A
Expired / Lapsed
US
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Coagulation of cellulosic colloids
Assignee: Akzo Nobel UK PLC
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Filing: 1953-01-29
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Granted: 1959-09-01
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Expires: 1973-01-29
Abstract
No abstract record available.
Inventors
- 👤 David T Milne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:03
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD OF PRODUCING FILAMENTS, FILMS AND TUBES WHICHARE SELF-SUPPORTING IN THE WET GEL STATE WHICH COMPRISES DISSOLVING AN ALKALI-SOLUBLE CELLULOSIC MATERIAL IN AN AQUEOUS ALKALINE MEDIUM AND EXTRUDING THE RESULTING SOLUTIONTHROUGH ANORIFICE INTO ANAQUEOUS COAGULATING BATH COMPRISING AN AQUEOUS SOLUTIONCONSISTING ESSENTIALLY OF WATER, THE PHOSPHATE RADICAL IN AN AMOUNT OF AT LEAST ABOUT 2.5 GRAM-MOLES PER KILOGRAM OF SOLUTION AND AN ALKALI METAL RADICAL IN AN AMOUNT OF AT LEAST ABOUT 2.1 GRAM-MOLES PER KILOGRAM OF SOLUTION.
Claim 2
Independent Claim
78 words
A METHOD OF PRODUCING FILAMENTS, FILMS AND TUBES WHICHARE SELF-SUPPORTING IN THE WET GEL STATE WHICH COMPRISES DISSOLVING AN ALKALI-SOLUBLE CELLULOSIC MATERIAL IN AN AQUEOUS ALKALINE MEDIUM AND EXTRUDING THE RESULTING SOLUTIONTHROUGH ANORIFICE INTO ANAQUEOUS COAGULATING BATH COMPRISING AN AQUEOUS SOLUTIONCONSISTING ESSENTIALLY OF WATER, THE PHOSPHATE RADICAL IN AN AMOUNT OF AT LEAST ABOUT 2.5 GRAM-MOLES PER KILOGRAM OF SOLUTION AND AN ALKALI METAL RADICAL IN AN AMOUNT OF AT LEAST ABOUT 2.1 GRAM-MOLES PER KILOGRAM OF SOLUTION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |