Patent US3235442A successfully refreshed from Google Patents.
US3235442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crimped tow of polyester filaments
Assignee: EIDP Inc
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Filing: 1962-07-30
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Granted: 1966-02-15
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Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 Stump William Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:43
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12; D02G1/127; D01; D01D; D01D5/00; D01D5/22; D01D5/23; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/29; Y10T428/2904; Y10T428/2907; Y10T428/2913; Y10T428/2922; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A RIBBON-LIKE TOW OF SUBSTANTIALLY PARALLEL FILAMENTS, OF CRYSTALLIZABLE LINEAR GLYCOL TEREPHTHALATE POLYESTER MATERIAL, THE FILAMENTS HAVING A TWO-DIMENSIONAL CRIMP WHICH IS SUBSTANTIALLY IN REGISTER TRANSVERSELY ACROSS THE TOW AND COHERING SUFFICIENTLY TO PACK READILY FOR SHIPPING AT A DENSITY OF ABOUT 20 POUNDS PER CUBIC FOT, THE 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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |