Patent US2767725A successfully refreshed from Google Patents.
US3073002A
Expired / Lapsed
US
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Non-distorting polypropylene fibers
Assignee: E B & A C Whiting
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Filing: 1960-03-28
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Granted: 1963-01-15
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Expires: 1980-03-28
Abstract
No abstract record available.
Inventors
- 👤 Plummer C Munt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:43
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/04; D01F6/06; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A METHOD FOR PRODUCING AN ISOTACTIC POLYPROPYLENE ORIENTED FIBER WHICH WILL NOT DISTORT WHEN HEATED WHICH COMPRISES HEATING AN ORIENTED FIBER OF ISOTACTIC POLYPROPYLENE WHILE THE LONGITUDINAL AXIS OF THE FIBER IS MAINTAINED IN A STRAIGHT LINE BY MEANS OF LATERAL CONSTRAINT AND IN A RELAXED CONDITION TO A TEMPERATURE WITHIN THE RANGE OF 100*F. TO ABOUT 320*F.
Claim 2
Independent Claim
58 words
A METHOD FOR PRODUCING AN ISOTACTIC POLYPROPYLENE ORIENTED FIBER WHICH WILL NOT DISTORT WHEN HEATED WHICH COMPRISES HEATING AN ORIENTED FIBER OF ISOTACTIC POLYPROPYLENE WHILE THE LONGITUDINAL AXIS OF THE FIBER IS MAINTAINED IN A STRAIGHT LINE BY MEANS OF LATERAL CONSTRAINT AND IN A RELAXED CONDITION TO A TEMPERATURE WITHIN THE RANGE OF 100*F. TO ABOUT 320*F.
References Cited (Backward Citations)
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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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |