Patent US3349052A successfully refreshed from Google Patents.
US3349052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic fibers and method of preparing same
Assignee: Sunoco Inc
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Filing: 1965-03-03
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Granted: 1967-10-24
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Expires: 1985-03-03
Abstract
No abstract record available.
Inventors
- 👤 Zaayenga Ralph
- 👤 Francis B Bartholf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:25
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/04; D01D; D01D5/00; D01D5/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
METHOD OF FORMING THERMOLASTIC FIBERS WHICH COMPRISES (1) HEATING AMONOGENEOUS BLEND OF POLYETHYLENE AND HYDROCARBON WAX TO ABOVE THE SOFTENING POINT OF THE BLEND, SAID BLEND CONTAING 35-75% POLYETHYLENE AND 25-65% WAX, SAID POLYETHYLENE HAVING A DENSITY OF 0.925 TO ABOUT 0.920, (2) COOLING SAID BLEND TO BELOW ITS SOFTENING POINT WHILE SIMULTANEOUSLY MIXING SAME, WHEREBY SAID HOMOENEOUS BLEND SOLIDIFIES AS A PLURALITY OF SMALL DISCRETE FIBERS, AND (3) RECOVERING SAID FIBERS.
Claim 2
Dependent Claim
72 words
METHOD OF FORMING THERMOLASTIC FIBERS WHICH COMPRISES (1) HEATING AMONOGENEOUS BLEND OF POLYETHYLENE AND HYDROCARBON WAX TO ABOVE THE SOFTENING POINT OF THE BLEND, SAID BLEND CONTAING 35-75% POLYETHYLENE AND 25-65% WAX, SAID POLYETHYLENE HAVING A DENSITY OF 0.925 TO ABOUT 0.920, (2) COOLING SAID BLEND TO BELOW ITS SOFTENING POINT WHILE SIMULTANEOUSLY MIXING SAME, WHEREBY SAID HOMOENEOUS BLEND SOLIDIFIES AS A PLURALITY OF SMALL DISCRETE FIBERS, AND (3) RECOVERING SAID FIBERS.
References Cited (Backward Citations)
US3105823A
Cited
US3230191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |