Patent US3809075A successfully refreshed from Google Patents.
US3048465A
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Polyolefin wet spinning process
Assignee: Glanzstoff AG
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Filing: 1960-09-07
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Granted: 1962-08-07
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Expires: 1980-09-07
Abstract
No abstract record available.
Inventors
- 👤 Jurgeleit Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:56
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/04; C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L91/00; D01D; D01D1/00; D01D1/06; D01D1/065; D01D5/00; D01D5/06; C08L2203/00; C08L2203/12; C08L23/04; C08L23/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN A PROCESS FOR THE PRODUCTION OF POLYOLEFIN FILAMENT IN WHICH THE POLYOLEFIN HAS A MOLECULAR WEIGHT OF AT LEAST 60,000 AND IS SPUN FROM AN ORGANIC SOLVENT SPINNING SOLUTION, THE SOLVENT EXTRACTED FROM THE FILAMENT AND THE FILAMENT STRETCHED FOR FIBER ORIENTATION, THE STEPS WHICH COMPRISE: EXTRUDING THE POLYOLEFIN SPINNING SOLUTION CONTAINING FROM ABOUT 10 TO NOT MORE THAN 18% BY WEIGHT OF SAID POLYOLEFIN THROUGH AN AIR SPACE OF AT LEAST FIVE CENTIMETERS INTO A SOLIDIFYING BATH CONTAINING A LIQUID MEDIUM INERT TO BOTH THE POLYOLEFIN AND ITS SOLVENT; COOLING AND SOLIDIFYING THE SPUN FILAMENT SUBSTANTIALLY WITHOUT SOLVENT EXTRACTION IN SAID LIQUID MEDIUM WHICH IS MAINTAINED AT A TEMPERATURE OF ABOUT 0* C. TO 30* C.; EXTRACTING THE SOLVENT FROM THE FILAMENT IN A SECOND BATH CONTAINING A LIQUID WHICH IS INERT TO THE POLYOLEFIN BUT WHICH IS MISCIBLE WITH THE ORGANIC SOLVENT; AND STRETCHING THE SOLVENTEXTRACTED FILAMENT.
Claim 2
Dependent Claim
150 words
IN A PROCESS FOR THE PRODUCTION OF POLYOLEFIN FILAMENT IN WHICH THE POLYOLEFIN HAS A MOLECULAR WEIGHT OF AT LEAST 60,000 AND IS SPUN FROM AN ORGANIC SOLVENT SPINNING SOLUTION, THE SOLVENT EXTRACTED FROM THE FILAMENT AND THE FILAMENT STRETCHED FOR FIBER ORIENTATION, THE STEPS WHICH COMPRISE: EXTRUDING THE POLYOLEFIN SPINNING SOLUTION CONTAINING FROM ABOUT 10 TO NOT MORE THAN 18% BY WEIGHT OF SAID POLYOLEFIN THROUGH AN AIR SPACE OF AT LEAST FIVE CENTIMETERS INTO A SOLIDIFYING BATH CONTAINING A LIQUID MEDIUM INERT TO BOTH THE POLYOLEFIN AND ITS SOLVENT; COOLING AND SOLIDIFYING THE SPUN FILAMENT SUBSTANTIALLY WITHOUT SOLVENT EXTRACTION IN SAID LIQUID MEDIUM WHICH IS MAINTAINED AT A TEMPERATURE OF ABOUT 0* C. TO 30* C.; EXTRACTING THE SOLVENT FROM THE FILAMENT IN A SECOND BATH CONTAINING A LIQUID WHICH IS INERT TO THE POLYOLEFIN BUT WHICH IS MISCIBLE WITH THE ORGANIC SOLVENT; AND STRETCHING THE SOLVENTEXTRACTED FILAMENT.
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) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |