Patent US3566683A successfully refreshed from Google Patents.
US3566683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Needle pull tester
Assignee: Celanese Corp
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Filing: 1969-04-01
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Granted: 1971-03-02
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Expires: 1989-04-01
Abstract
Abstract THE DEGREE OF ENTANGLEMENT IN A LENGTH OF YARN IS MEASURED BY ARRANGING THE YARN ALONG A PREDETERMINED PATH WITH A NEEDLE POSITIONED ADJACENT THE YARN PATH. THE YARN IS SPREAD LATERALLY ADJACENT THE NEEDLE AT A PREDETERMINED TENSION AND THE YARN IS THEN PIERCED BY THE NEEDLE. THE YARN IS MOVED RELATIVE TO THE NEEDLE ALONG THE YARN PATH AND WHEN AN INCREASE IN TENSION IN THE YARN ABOVE A PREDETERMINED VALUE IS REACHED, THE LENGTH OF THE RELATIVE MOVEMENT OF THE YARN IS A MEASURE OF THE DEGREE OF ENTANGLEMENT OF THE YARN.
Inventors
- 👤 Jackie Neal Bulla
- 👤 Peter Conrad
- 👤 Billy Brown Fesperman
- 👤 Robert Edwin Hinson Jr
- 👤 Charles E Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:11
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/36; G01N33/365; G01M; G01M99/00
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |