US3568474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of warp knitting a pile fabric
Assignee: Individual
•
Filing: 1968-08-19
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Granted: 1971-03-09
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Expires: 1988-08-19
Abstract
Abstract A WARP KNITTED PILE FABRIC IS FORMED ON A SINGLE SET OF SPRING OR BEARDED NEEDLES WITH TWO OR MORE YARN GUIDES BY LEAVING SOME OF THE NEEDLES EMPTY AND USING THEM FOR FORMING LOOPS, BUT NOT STITCHES OF THE PILE YARN. THE PILE YARN CROSSES ONE OR MORE WALES OF GROUND FABRIC STITCHES BETWEEN LOOPS AND IS BOUND TO AT LEAST ONE OF THE CROSSED WALES BY BEING LAID INTO THE STITCHES OF THE SAME WITHOUT ITSELF FORMING ANY STITCHES.
Inventors
- 👤 Otto Paul Gottfried Berthold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:00
CPC Classifications
D; D04; D04B; D04B21/00; D04B21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |