Patent US3093444A successfully refreshed from Google Patents.
US3093444A
Expired / Lapsed
US
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Process of preparing a helically crimped polypropylene filament
Assignee: EIDP Inc
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Filing: 1961-07-10
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Granted: 1963-06-11
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Expires: 1981-07-10
Abstract
No abstract record available.
Inventors
- 👤 Martin Bruce Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/221; D01; D01D; D01D5/00; D01D5/22; D01F; D01F6/00; D01F6/02; D01F6/04; D01F6/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
PROCESS OF PREPARING A HELICALLY CRIMPED POLYPROPYLENE FILAMENT WHICH PROCESS COMPRISES DRAWING A POLYPROPYLENE FILAMENT HAVING GAMMA ORIENTATION AND AN ORIENTATION ANGLE OF 10* TO 36*, SAID FILAMENT NOT HAVING BEEN PRE-DRAWN AT A DRAW RATIO OF GREATER THAN 1.86X, AT A DRAW RATIO OF AT LEAST 1.4X BUT NOT ABOVE A TOTAL DRAW RATIO, INCLUDING ANY PRE-DRAWING, OF 2.6X, UNDER CONDITIONS THAT SAID DRAW RATIO IS 60% TO 100% OF THE MAXIMUM DRAW RATIO, AND THEREAFTER RELEASING THE DRAWING TENSION WHEREBY SAID FILAMENT DEVELOPS AT LEAST FIVE HELICAL CRIMPS PER INCH.
Claim 2
Dependent Claim
92 words
PROCESS OF PREPARING A HELICALLY CRIMPED POLYPROPYLENE FILAMENT WHICH PROCESS COMPRISES DRAWING A POLYPROPYLENE FILAMENT HAVING GAMMA ORIENTATION AND AN ORIENTATION ANGLE OF 10* TO 36*, SAID FILAMENT NOT HAVING BEEN PRE-DRAWN AT A DRAW RATIO OF GREATER THAN 1.86X, AT A DRAW RATIO OF AT LEAST 1.4X BUT NOT ABOVE A TOTAL DRAW RATIO, INCLUDING ANY PRE-DRAWING, OF 2.6X, UNDER CONDITIONS THAT SAID DRAW RATIO IS 60% TO 100% OF THE MAXIMUM DRAW RATIO, AND THEREAFTER RELEASING THE DRAWING TENSION WHEREBY SAID FILAMENT DEVELOPS AT LEAST FIVE HELICAL CRIMPS PER INCH.
References Cited (Backward Citations)
US2289232A
Cited
US2925641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |