Patent US4988560A successfully refreshed from Google Patents.
US4988560A
Expired / Lapsed
US
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Oriented melt-blown fibers, processes for making such fibers, and webs made from such fibers
Assignee: 3M Co
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Filing: 1987-12-21
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Granted: 1991-01-29
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Expires: 2007-12-21
Abstract
Abstract Oriented microfibers and processes for making them are disclosed, together with blends of such microfibers with other fibers such as crimped staple fibers and non-oriented microfibers.
Inventors
- 👤 Daniel E. Meyer
- 👤 Dennis L. Krueger
- 👤 Hassan Bodaghi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:57
CPC Classifications
D; D04; D04H; D04H5/00; D04H5/08; D04H3/00; D04H3/08; D04H3/16; D01; D01D; D01D5/00; D01D5/08; D01D5/098; D01D5/0985; D04H1/00; D04H1/40; D04H1/42; D04H1/4326; D04H1/435; D04H1/54; D04H1/56; D04H5/06; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S428/903; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2909; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/614; Y10T442/619; Y10T442/627; Y10T442/68
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
32 words
Nonwoven fabric comprising oriented microfibers having an average diameter of about 10 micrometers or less and crimped staple fibers blended with the microfibers to form a coherent handleable lofty resiliently compressible web.
Claim 2
Dependent Claim
32 words
Nonwoven fabric comprising oriented microfibers having an average diameter of about 10 micrometers or less and crimped staple fibers blended with the microfibers to form a coherent handleable lofty resiliently compressible web.
Claim 3
Dependent Claim
17 words
Fabric of claim 1 in which the oriented microfibers exhibit interrupted ring patterns in a WAXS photograph.
Claim 4
Dependent Claim
12 words
Fabric of claim 1 in which the oriented microfibers comprise polyethylene terephthalate.
Claim 5
Dependent Claim
19 words
Fabric of claim 1 in which the crimped staple fibers comprise at least about 10 weight-percent of the web.
Claim 6
Dependent Claim
19 words
Fabric of claim 1 in which the web has a loft of at least 30 cubic centimeters per gram.
Claim 7
Dependent Claim
14 words
Garment comprising the fabric of claim 1 as an insulation layer in the garment.
Claim 8
Dependent Claim
19 words
Fabric of claim 1 in which the melt-blown fibers have a crystalline axial orientation function of at least 0.65.
Claim 9
Dependent Claim
19 words
Fabric of claim 1 in which the melt-blown fibers have a crystalline axial orientation function of at least 0.8.
Claim 10
Dependent Claim
28 words
Nonwoven fabric comprising oriented melt-blown fibers that have a crystalline orientation function of at least about 0.5 and non-oriented fibers being blended together as a coherent handleable web.
Claim 11
Dependent Claim
28 words
Nonwoven fabric comprising oriented melt-blown fibers that have a crystalline orientation function of at least about 0.5 and non-oriented fibers being blended together as a coherent handleable web.
Claim 12
Dependent Claim
18 words
Nonwoven fabric of claim 9 in which the non-oriented fibers have a crystalline orientation function of substantially zero.
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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) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |