US2824780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament formation from polymeric dispersions
Assignee: EIDP Inc
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Filing: 1953-04-10
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Granted: 1958-02-25
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Expires: 1973-04-10
Abstract
No abstract record available.
Inventors
- 👤 Cameron B Satterthwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:17
CPC Classifications
D; D01; D01D; D01D5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE PROCESS OF PREPARING FIBERS FROM A SYNTHETIC FIBER-FROMING POLYMER WHICH COMPRISES FORMING A SMOOTH FLOWABLE PASTE BY MIXING THE SAID POLYMER IN THE FINELYDIVIDED STATE WITH A LIQUID VEHICLE OF LOW VOLATILITY WHICH IS A POOR SOLVENT FOR THE POLYMER AT ROOM TEMPERATURE BUT HAS SUFFICIENT SOLVENT POWER FOR THE POLYMER AT A TEMPERATURE BETWEEN 80*C. AND 400*C. TO COALESCE THE POLYMER, EXTRUDING THE SAID PASTE THROUGH A SPINNERET WHILE THE POLYMER PARTICLES ARE IN THEIR PARTICULATE STATE TO FORM A FUNICULAR STRUCTURE, COALESCING THE POLYMER PARTICLES IN THE PRESENCE OF THE SAID VEHICLE BY INCREASING THE TEMPERATURE THEEROF UNTIL THE POLYMER LOSES ITS PARTICULATE STATE.
Claim 2
Dependent Claim
107 words
THE PROCESS OF PREPARING FIBERS FROM A SYNTHETIC FIBER-FROMING POLYMER WHICH COMPRISES FORMING A SMOOTH FLOWABLE PASTE BY MIXING THE SAID POLYMER IN THE FINELYDIVIDED STATE WITH A LIQUID VEHICLE OF LOW VOLATILITY WHICH IS A POOR SOLVENT FOR THE POLYMER AT ROOM TEMPERATURE BUT HAS SUFFICIENT SOLVENT POWER FOR THE POLYMER AT A TEMPERATURE BETWEEN 80*C. AND 400*C. TO COALESCE THE POLYMER, EXTRUDING THE SAID PASTE THROUGH A SPINNERET WHILE THE POLYMER PARTICLES ARE IN THEIR PARTICULATE STATE TO FORM A FUNICULAR STRUCTURE, COALESCING THE POLYMER PARTICLES IN THE PRESENCE OF THE SAID VEHICLE BY INCREASING THE TEMPERATURE THEEROF UNTIL THE POLYMER LOSES ITS PARTICULATE STATE.
References Cited (Backward Citations)
US2644802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |