US3100675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for melt spinning polyethylene terephthalate
Assignee: Onderzoekings Instituut Research
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Filing: 1960-06-21
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Granted: 1963-08-13
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Expires: 1980-06-21
Abstract
No abstract record available.
Inventors
- 👤 Westerhuis Eggo
- 👤 Kok Karel Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:37
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/08; D01D4/00; D01D4/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A PROCESS FOR THE PRODUCTION OF POLYETHYLENE TEREPHTHALATE FILAMENTARY MATERIAL COMPRISING THE STEPS OF EXTRUDING MOLTEEN SOLVENT FREE POLYETHYLENE TEREPHALATE AT A TEMPERATURE OF AT LEASR 168* C. TTHROUGH A SPINNING PLATE CONTAINING A PLURALITY OF ORIFICES, SAID SPINNING PLATE BEING MAINTAINED AT A TEMPERATURE OF AT LEAST 268* C., FORMING SAID MOLTEN POLYETHYLENE TEREPHTHALATE INTO A PLURALITY OF FILAMENTS, ARRANGING SAID FILAMENTS IN A PLURALITY OF PARALLEL ROWS WHEREIN THE DISTANCES BETWEEN ORIFFICES IN ONE ROW ARE ABOUT 5.5 TO 10 MM., SAID FILAMENTS WITHHIN EACH ROW BEING EQUALLY SPACED, SAID ROWS BEING SO SPACED THAT THE DISTANCE BETWEEN EACH ROW IS LESS THAN THE DISTANCE BETWEEN SAID EQUALLY SPACED FILAMENTS, INSULATION SAID FILAMENTS FROM THE AMBIENT ATMOSPHERE FOR A DISTANCE OFF FROM 7 TO 14 CENTIMETERS AND THEREAFTER PASSING COOLING GASEOUS MEDIUM TRANS VERSELY ACROSS SAID FILAMENTS, SAID MEDIUM HAVING A VELOCITY OF AT LEAST 25 CENTEMETERS PER SECOND AND BEING DIRECTED PARALLEL TO SAID PLURALITY OF PARALLEL OF FILAMENTS.
Claim 2
Dependent Claim
162 words
A PROCESS FOR THE PRODUCTION OF POLYETHYLENE TEREPHTHALATE FILAMENTARY MATERIAL COMPRISING THE STEPS OF EXTRUDING MOLTEEN SOLVENT FREE POLYETHYLENE TEREPHALATE AT A TEMPERATURE OF AT LEASR 168* C. TTHROUGH A SPINNING PLATE CONTAINING A PLURALITY OF ORIFICES, SAID SPINNING PLATE BEING MAINTAINED AT A TEMPERATURE OF AT LEAST 268* C., FORMING SAID MOLTEN POLYETHYLENE TEREPHTHALATE INTO A PLURALITY OF FILAMENTS, ARRANGING SAID FILAMENTS IN A PLURALITY OF PARALLEL ROWS WHEREIN THE DISTANCES BETWEEN ORIFFICES IN ONE ROW ARE ABOUT 5.5 TO 10 MM., SAID FILAMENTS WITHHIN EACH ROW BEING EQUALLY SPACED, SAID ROWS BEING SO SPACED THAT THE DISTANCE BETWEEN EACH ROW IS LESS THAN THE DISTANCE BETWEEN SAID EQUALLY SPACED FILAMENTS, INSULATION SAID FILAMENTS FROM THE AMBIENT ATMOSPHERE FOR A DISTANCE OFF FROM 7 TO 14 CENTIMETERS AND THEREAFTER PASSING COOLING GASEOUS MEDIUM TRANS VERSELY ACROSS SAID FILAMENTS, SAID MEDIUM HAVING A VELOCITY OF AT LEAST 25 CENTEMETERS PER SECOND AND BEING DIRECTED PARALLEL TO SAID PLURALITY OF PARALLEL OF FILAMENTS.
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) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |