Patent US3059991A successfully refreshed from Google Patents.
US3059991A
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Method of making oriented filamentary article of isotactic polypropylene
Assignee: E B & A C Whiting Co
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Filing: 1959-03-20
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Granted: 1962-10-23
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Expires: 1979-03-20
Abstract
No abstract record available.
Inventors
- 👤 Plummer C Munt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:13
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/224; A; A46; A46D; A46D1/00; D01; D01D; D01D4/00; D01D4/02; D01F; D01F6/00; D01F6/02; D01F6/04; D01F6/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF MAKING AN ORIENTED FILAMENTARY ARTICLE OF ISOTACTIC POLYPROPYLENE WHICH COMPRISES MELT EXTRUDING A FILAMENT OF SAID POLYMER, IMMEDIATELY IMMERSING AND QUENCHING SAID EXTRUDED FILAMENT IN A BATH OF A NON-SOLVENT LIQUID FOR SAID POLYMER AT A TEMPERATURE OF FROM ABOUT 40* F. TO AT LEAST AS LOW AS ABOUT 60* F., THEN HEATING SAID QUENCHED FILAMENT TO A TEMPERATURE WITHIN ITS SOFTENING RANGE AND LONGITUDINALLY STRETCHING SAID HEAT-SOFTENED FILAMENT.
Claim 2
Independent Claim
72 words
A METHOD OF MAKING AN ORIENTED FILAMENTARY ARTICLE OF ISOTACTIC POLYPROPYLENE WHICH COMPRISES MELT EXTRUDING A FILAMENT OF SAID POLYMER, IMMEDIATELY IMMERSING AND QUENCHING SAID EXTRUDED FILAMENT IN A BATH OF A NON-SOLVENT LIQUID FOR SAID POLYMER AT A TEMPERATURE OF FROM ABOUT 40* F. TO AT LEAST AS LOW AS ABOUT 60* F., THEN HEATING SAID QUENCHED FILAMENT TO A TEMPERATURE WITHIN ITS SOFTENING RANGE AND LONGITUDINALLY STRETCHING SAID HEAT-SOFTENED FILAMENT.
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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) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |