Patent US601571A successfully refreshed from Google Patents.
US3620002A
Expired / Lapsed
US
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Open end spinning assembly and method
Assignee: Roberts Co
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Filing: 1969-03-17
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Granted: 1971-11-16
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Expires: 1989-03-17
Abstract
Abstract AN OPEN END SPINNING ASSEMBLY AND METHOD IN WHICH PERDERABLY INDIVIDUAL FIBERS ARE SEPERATED IN A FIRST ZONE FROM A FIBROUS SUPPLY MASS TO FLOW IN A SUBSTANTALLY NONTUBULENT AIR STREAM, PREFERABLY ACCERLERATED FLOW, IN A DIRECTED PATH OF TRAVEL FOR DEPOSITION ON A SURFACE OF A ROTATING CENTRIFUGAL TURBINE FOR FIBER REMOVAL THERFROM AS A SPUN YARN IN ANOTHER ZONE REMOTE FROM THE FIRST ZONE WHERE THE FIBERS ARE INTRODUCED.
Inventors
- 👤 Peter F Grishin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:33
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/04; D01H4/08
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |