US3325342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystalline polyalkylene isophthalamide filaments with voids
Assignee: EIDP Inc
•
Filing: 1963-03-19
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Granted: 1967-06-13
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Expires: 1983-03-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Willard Hallam Bonner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:57
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; D01F6/605; Y; Y10; Y10S; Y10S521/00; Y10S521/918; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975; Y10T428/31504; Y10T428/31725
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A DRAWN FILAMENT COMPRISED OF A POLYAMIDE TAKEN FROM THE GROUP CONSISTING OF POLYHEXAMETHYLENE ISOPHTHALAMIDE AND POLYTETRAMETHYLENE ISOPHTHALAMIDE, SAID FILAMENT HAVING A CRYSTALLINITY INDEX EXCEEDING 40, A DENSITY OF ABOUT 1 AND VOIDS THEREIN GIVING IT A DELUSTERED APPEARANCE, SAID FILAMENT ALSO SHOWING ORIENTATION IN THE CRYSTALLINE REGIONS AS INDICATED BY A LOW ORIENTATION ANGLE.
Claim 2
Dependent Claim
55 words
A DRAWN FILAMENT COMPRISED OF A POLYAMIDE TAKEN FROM THE GROUP CONSISTING OF POLYHEXAMETHYLENE ISOPHTHALAMIDE AND POLYTETRAMETHYLENE ISOPHTHALAMIDE, SAID FILAMENT HAVING A CRYSTALLINITY INDEX EXCEEDING 40, A DENSITY OF ABOUT 1 AND VOIDS THEREIN GIVING IT A DELUSTERED APPEARANCE, SAID FILAMENT ALSO SHOWING ORIENTATION IN THE CRYSTALLINE REGIONS AS INDICATED BY A LOW ORIENTATION ANGLE.
References Cited (Backward Citations)
US2880057A
Cited
US3225125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |