US2987373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing polyalkylene terephthalate threads
Assignee: Onderzoekings Instituut Research
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Filing: 1959-10-29
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Granted: 1961-06-06
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Expires: 1979-10-29
Abstract
No abstract record available.
Inventors
- 👤 Bezemer Arie
- 👤 Sagasser Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:43
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/08; D01D5/088; D01D5/0885; D01F; D01F6/00; D01F6/58; D01F6/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR MANUFACTURING POLYALKYLENE TEREPHTHALATE THREADS COMPRISING EXTRUDING MOLTEN POLYALKYLENE TEREPHTHALATE IN THE FORM OF THREADS, IMMEDIATELY THEREAFTER INTRODUCING SAID FRESHLY SPUN POLYALKYLENE TEREPHTHALATE THREADS INTO A LIQUID COOLING BATH, PASSING SAID THREADS THROUGH SAID BATH TO SOLIDIFY AND COOL THE SAME, ALTERING THE PASSAGE OF SAID THREAD THROUGH SAID BATH WHERE THE TEMPERATURE THEREOF CORRESPONDS TO THE SECOND ORDER TRANSITION POINT OF SAID THREADS, REMOVING SAID THREADS FROM SAID BATH, AND COLLECTING THE SAME.
Claim 2
Dependent Claim
76 words
A PROCESS FOR MANUFACTURING POLYALKYLENE TEREPHTHALATE THREADS COMPRISING EXTRUDING MOLTEN POLYALKYLENE TEREPHTHALATE IN THE FORM OF THREADS, IMMEDIATELY THEREAFTER INTRODUCING SAID FRESHLY SPUN POLYALKYLENE TEREPHTHALATE THREADS INTO A LIQUID COOLING BATH, PASSING SAID THREADS THROUGH SAID BATH TO SOLIDIFY AND COOL THE SAME, ALTERING THE PASSAGE OF SAID THREAD THROUGH SAID BATH WHERE THE TEMPERATURE THEREOF CORRESPONDS TO THE SECOND ORDER TRANSITION POINT OF SAID THREADS, REMOVING SAID THREADS FROM SAID BATH, AND COLLECTING THE SAME.
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) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |