Patent US4384098A successfully refreshed from Google Patents.
US4384098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filamentary polypropylene and method of making
Assignee: BP Corp North America Inc
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Filing: 1981-01-13
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Granted: 1983-05-17
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Expires: 2001-01-13
Abstract
Abstract In accordance with the present invention, novel lustrous, filamentary polypropylene products are produced by melt spinning a polypropylene resin, having a molecular weight distribution of less than about 7 and a melt flow between about 20 and about 60, at a spinning temperature below about 510° F. and taking up the spun filaments at a speed above about 1200 meters per minute. A novel product having a high degree of luster is also produced in accordance with the present invention.
Inventors
- 👤 Gerald E. Hagler
- 👤 Charles S. Hatcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:54
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/04; D01F6/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
57 words
A process for making filamentary materials having a high degree of lustre, comprising: melt spinning a polypropylene resin, having a molecular weight distribution of less than about 7 and a melt flow between about 20 and about 60, at a spinning temperature below about 510° F. and at a takeup speed above about 1000 meters per minute.
Claim 2
Dependent Claim
57 words
A process for making filamentary materials having a high degree of lustre, comprising: melt spinning a polypropylene resin, having a molecular weight distribution of less than about 7 and a melt flow between about 20 and about 60, at a spinning temperature below about 510° F. and at a takeup speed above about 1000 meters per minute.
Claim 3
Dependent Claim
19 words
A process in accordance with claim 1 wherein the spinning temperature is between about 420° and about 480° F.
Claim 4
Dependent Claim
15 words
A process in accordance with claim 2 wherein the spinning temperature is about 460° F.
Claim 5
Dependent Claim
23 words
A process in accordance with claim 1 wherein the filamentary material takeup speed is between about 1200 and about 5000 meters per minute.
Claim 6
Dependent Claim
19 words
A process in accordance with claim 4 wherein the filamentary material takeup speed is about 2000 meters per minute.
Claim 7
Dependent Claim
14 words
A process in accordance with claim 1 wherein the filamentary materials are also drawn.
Claim 8
Dependent Claim
27 words
A process in accordance with claim 6 wherein the filamentary materials are drawn at a draw ratio between about 2 to 1 and about 4 to 1.
Claim 9
Dependent Claim
58 words
Polypropylene filamentary materials having a high degree of luster, comprising: filamentary materials melt spun from a polypropylene resin having a molecular weight distribution of less than about 7 and a melt flow between about 20 and about 60, at a spinning temperature below about 510° F. and at a spinning takeup speed above about 1000 meters per minute.
Claim 10
Dependent Claim
58 words
Polypropylene filamentary materials having a high degree of luster, comprising: filamentary materials melt spun from a polypropylene resin having a molecular weight distribution of less than about 7 and a melt flow between about 20 and about 60, at a spinning temperature below about 510° F. and at a spinning takeup speed above about 1000 meters per minute.
Claim 11
Dependent Claim
19 words
Filamentary materials in accordance with claim 8 wherein the spinning temperature is between about 420° and about 480° F.
Claim 12
Dependent Claim
15 words
Filamentary materials in accordance with claim 9 wherein the spinning temperature is about 460° F.
Claim 13
Dependent Claim
23 words
Filamentary materials in accordance with claim 1 wherein the filamentary material takeup speed is between about 1200 and about 5000 meters per minute.
Claim 14
Dependent Claim
19 words
Filamentary materials in accordance with claim 11 wherein the filamentary material takeup speed is about 2000 meters per minute.
Claim 15
Dependent Claim
14 words
Filamentary materials in accordance with claim 8 wherein filamentary materials are drawn filamentary materials.
Claim 16
Dependent Claim
27 words
Filamentary materials in accordance with claim 13 wherein the filamentary materials have been drawn at a draw ratio between about 2 to 1 and 4 to 1.
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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) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |