Patent US3225534A successfully refreshed from Google Patents.
US3225534A
Expired / Lapsed
US
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Differential shrinkage yarn
Assignee: EIDP Inc
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Filing: 1964-02-25
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Granted: 1965-12-28
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Expires: 1984-02-25
Abstract
No abstract record available.
Inventors
- 👤 Knospe Robert Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:03
CPC Classifications
D; D05; D05B; D05B3/00; D01; D01D; D01D5/00; D01D5/22; D01F; D01F6/00; D01F6/58; D01F6/60; D01F6/78; D01F6/80; D01F6/88; D01F6/90; D02; D02G; D02G1/00; D02G1/18; Y; Y10; Y10S; Y10S264/00; Y10S264/26; Y10S57/00; Y10S57/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A FILAMENTARY YARN COMPRISED OF A PLURALITY OF INTERMINGLED, DIFFERENTIALLY SHRINKABLE, DRAWN CONTINUOUS FILAMENTS OF TWO DIFFERENT COMPOSITIONS, THE FIRST COMPOSITION BEING POLYHEXAMETHYLENE ADIPAMIDE, THE SECOND COMPOSITION BEING TAKEN FROM THE GROUP CONSISTING OF (1) A MELT BLEND OF POLYHEXAMETHYLENE ADIPAMIDE AND POLYVINYL PYRROLIDONE AND (2) A COPOLYMER OF HEXAMETHYLENE ADIPAMIDE AND HEXAMETHYLENE ISOPHTHALAMIDE, SAID FILAMENTS BEING CHARACTERIZED AS TO VISCOELASTIC EQUALITY BY STRESS/ MODULUS RATIOS DIFFERING BY NO MORE THAN 0.001.
Claim 2
Dependent Claim
72 words
A FILAMENTARY YARN COMPRISED OF A PLURALITY OF INTERMINGLED, DIFFERENTIALLY SHRINKABLE, DRAWN CONTINUOUS FILAMENTS OF TWO DIFFERENT COMPOSITIONS, THE FIRST COMPOSITION BEING POLYHEXAMETHYLENE ADIPAMIDE, THE SECOND COMPOSITION BEING TAKEN FROM THE GROUP CONSISTING OF (1) A MELT BLEND OF POLYHEXAMETHYLENE ADIPAMIDE AND POLYVINYL PYRROLIDONE AND (2) A COPOLYMER OF HEXAMETHYLENE ADIPAMIDE AND HEXAMETHYLENE ISOPHTHALAMIDE, SAID FILAMENTS BEING CHARACTERIZED AS TO VISCOELASTIC EQUALITY BY STRESS/ MODULUS RATIOS DIFFERING BY NO MORE THAN 0.001.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |