Patent US2918346A successfully refreshed from Google Patents.
US2918346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of orienting a dense tow of polymeric ester filaments by two step hot aqueous bath treatments
Assignee: EIDP Inc
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Filing: 1956-08-07
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Granted: 1959-12-22
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Expires: 1976-08-07
Abstract
No abstract record available.
Inventors
- 👤 William F Paulsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:32
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/223; D01; D01F; D01F6/00; D01F6/58; D01F6/62; Y; Y10; Y10S; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
THE PROCESS OF ORIENTING FILAMENTS COMPRISED OF A POLYMERIC ESTER OF TEREPHTHALIC ACID AND A GLYCOL SELECTED FROM THE SERIES CONSISTING OF H3(CH2)MOH WHERE N IS AN INTEGER FROM 2 TO 10 WHICH COMPRISES PASSING A TOW OF SUBSTANTIALLY UNORIENTED FILAMENTS HAVING A DENSITY IN EXCESS OF ABOUT 40,000 UNDRAWN DENIER PER INCH MEASURED ACROSS THE WIDTH OF THE TOW BUNDLE THROUGH AN INERT AQUEOUS BATH MAINTAINED AT A TEMPERATURE FROM ABOUT 40*C TO 70*C., AND WITHOUT ALLOWING THE TOW TO COOL DRAWING SAID TOW AT LEAST 2.3 TIMES ITS ORIGINAL LENGTH WHILE PASSING IT THROUGH A SECOND INERT FLUID BATH MAINTAINED AT A TEMPERATURE FROM ABOUT 60* TO 100*C., THE TEMPERATURE OF SAID SECOND BATH BEING AT LEAST 10*C. HIGHER THAN THE TEMPERATURE OF SAID FIRST BATH.
Claim 2
Dependent Claim
128 words
THE PROCESS OF ORIENTING FILAMENTS COMPRISED OF A POLYMERIC ESTER OF TEREPHTHALIC ACID AND A GLYCOL SELECTED FROM THE SERIES CONSISTING OF H3(CH2)MOH WHERE N IS AN INTEGER FROM 2 TO 10 WHICH COMPRISES PASSING A TOW OF SUBSTANTIALLY UNORIENTED FILAMENTS HAVING A DENSITY IN EXCESS OF ABOUT 40,000 UNDRAWN DENIER PER INCH MEASURED ACROSS THE WIDTH OF THE TOW BUNDLE THROUGH AN INERT AQUEOUS BATH MAINTAINED AT A TEMPERATURE FROM ABOUT 40*C TO 70*C., AND WITHOUT ALLOWING THE TOW TO COOL DRAWING SAID TOW AT LEAST 2.3 TIMES ITS ORIGINAL LENGTH WHILE PASSING IT THROUGH A SECOND INERT FLUID BATH MAINTAINED AT A TEMPERATURE FROM ABOUT 60* TO 100*C., THE TEMPERATURE OF SAID SECOND BATH BEING AT LEAST 10*C. HIGHER THAN THE TEMPERATURE OF SAID FIRST BATH.
References Cited (Backward Citations)
US2734794A
Cited
US2733122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |