Patent US3259681A successfully refreshed from Google Patents.
US3259681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester filaments
Assignee: Imperial Chemical Industries Ltd
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Filing: 1963-04-29
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Granted: 1966-07-05
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Expires: 1983-04-29
Abstract
No abstract record available.
Inventors
- 👤 Bull Thomas Henry
- 👤 Kinnear Arthur Murray Gardiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:59
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/228; D01; D01F; D01F6/00; D01F6/58; D01F6/62; D02J1/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A PROCESS FOR MELT-SPINNING AND ORIENTING POLYESTER FILAMENTS BY DRAWING UP TO 5 TIMES THEIR SPUN LENGTHS IN THE FORM OF A TOW, COMPRISING SUBMITTING FILAMENTS ISSUING FROM A SPINNERET TO A QUENCHING GAS STREAM AT A DISTANCE 0 TO 10 CM. FROM THE SPINNERET, WETTING THE TOW OF A LINEAR DENSITY OF AT LEAST 100,000 DENIER PER INCH AT DRAW FROM 100-600 FEET PER MINUTE IN A PREDRAWFRAME BATH AT A TEMPERATURE BETWEEN 10 AND 25*C., STRAIGHTENING ANY LOOPS IN THE TOW AND LUBRICATING THE TOW, TENSIONING THE TOW, THEN DRAWING THE TOW BY FORWARDING IT TO FEED ROLLS, THE LAST OF WHICH IS AT LEAST PARTIALLY IMMERSED IN A DRAWFRAME BATH FILLED WITH AQUEOUS LIQUID AT A TEMPERAGTURE BETWEEN 50 TO 100*C., THEN FORWARDING TO DRAW ROLLS AT LEAST ONE OF WHICH IS PARTIALLY IMMERSED IN THE DRAWFRAME BATH AND ROTATING SAID DRAWROLLS AT A LINEAR SPEED AT LEAST TWICE THAT OF THE FEED ROLLS.
Claim 2
Dependent Claim
157 words
A PROCESS FOR MELT-SPINNING AND ORIENTING POLYESTER FILAMENTS BY DRAWING UP TO 5 TIMES THEIR SPUN LENGTHS IN THE FORM OF A TOW, COMPRISING SUBMITTING FILAMENTS ISSUING FROM A SPINNERET TO A QUENCHING GAS STREAM AT A DISTANCE 0 TO 10 CM. FROM THE SPINNERET, WETTING THE TOW OF A LINEAR DENSITY OF AT LEAST 100,000 DENIER PER INCH AT DRAW FROM 100-600 FEET PER MINUTE IN A PREDRAWFRAME BATH AT A TEMPERATURE BETWEEN 10 AND 25*C., STRAIGHTENING ANY LOOPS IN THE TOW AND LUBRICATING THE TOW, TENSIONING THE TOW, THEN DRAWING THE TOW BY FORWARDING IT TO FEED ROLLS, THE LAST OF WHICH IS AT LEAST PARTIALLY IMMERSED IN A DRAWFRAME BATH FILLED WITH AQUEOUS LIQUID AT A TEMPERAGTURE BETWEEN 50 TO 100*C., THEN FORWARDING TO DRAW ROLLS AT LEAST ONE OF WHICH IS PARTIALLY IMMERSED IN THE DRAWFRAME BATH AND ROTATING SAID DRAWROLLS AT A LINEAR SPEED AT LEAST TWICE THAT OF THE FEED ROLLS.
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |