Patent US5387300A successfully refreshed from Google Patents.
US5387300A
Expired / Lapsed
US
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Method of manufacturing a seamless tubular woven article including polytetrafluoroethylene yarn
Assignee: Individual
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Filing: 1992-08-27
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Granted: 1995-02-07
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Expires: 2012-08-27
Abstract
Abstract Using an unsintered or sintered polytetrafluoroethylene yarn as at least part of warp and/or filling, a seamless tubular fabric is constructed. This construction is made by circular weaving or by inserting the filling into the warp prepared in the form of a hank or skein.
Inventors
- 👤 Atsushi Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:45
CPC Classifications
D; D03; D03D; D03D3/00; D03D3/04; D03D1/00; D03D1/0094; D03D15/00; D03D15/20; D03D15/242; D03D15/267; D03D15/275; D03D15/283; D03D15/50; D03D15/513; D03D15/587; D03D3/02; D10; D10B; D10B2101/00; D10B2101/02; D10B2101/06; D10B2101/10; D10B2101/12; D10B2321/00; D10B2321/02; D10B2321/021; D10B2321/0211; D10B2321/04; D10B2321/042; D10B2331/00; D10B2331/02; D10B2331/021; D10B2331/06; D10B2331/061
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A method of manufacturing a seamless tubular article comprising weaving a seamless tubular fabric, by a circular weaving method, using an unsintered polytetrafluoroethylene yarn at least as part of a warp and/or filling, wherein said unsintered polytetrafluoroethylene yarn is obtained by drawing a preliminary molding, either as such or after rolling, which preliminary molding is obtained by subjecting a fine powder of polytetrafluoroethylene to paste extrusion or calendering, performing a rolling operation on said seamless tubular fabric after weaving, and sintering said seamless tubular fabric after said rolling operation.
Claim 2
Independent Claim
89 words
A method of manufacturing a seamless tubular article comprising weaving a seamless tubular fabric, by a circular weaving method, using an unsintered polytetrafluoroethylene yarn at least as part of a warp and/or filling, wherein said unsintered polytetrafluoroethylene yarn is obtained by drawing a preliminary molding, either as such or after rolling, which preliminary molding is obtained by subjecting a fine powder of polytetrafluoroethylene to paste extrusion or calendering, performing a rolling operation on said seamless tubular fabric after weaving, and sintering said seamless tubular fabric after said rolling operation.
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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) | 1998-02-06 | 1998-08-08 | 1999-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-06 | 2002-08-08 | 2003-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-06 | 2006-08-08 | 2007-02-07 | $7700.00 | Window Closed / Lapsed |