US2555065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating a tow of filaments or threads
Assignee: Imperial Chemical Industries Ltd
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Filing: 1948-01-14
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Granted: 1951-05-29
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Expires: 1968-01-14
Abstract
No abstract record available.
Inventors
- 👤 Robin H K Thomson
- 👤 William E Tetlow
- 👤 Archibald M Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:46
CPC Classifications
D; D06; D06B; D06B3/00; D06B3/04; D01; D01D; D01D10/00; D01D10/04; D01D10/0436; D01D10/0472; D01F; D01F4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD FOR TREATING WITHOUT TANGLING A CONTINOUS TOW OF ARTIFICIAL WET SPUN PROTEIN FILAMENTS BY IMMERSION THEREOF IN A TREATING LIQUID FOR A RELATIVELY LONG PERIOD OF TIME, SAID METHOD COMPRISING THE STEPS CONTINUOUSLY FLOWING THE TREATING LIQUID THROUGH THE TROUGH PORTION OF A HORIZONTALLY DISPOSED, ROTATABLE RING TROUGH, ROTATING SAID TROUGH IN A HORIZONTAL PLANE ABOUT ITS CENTRAL AXIS AT SUBSTANTIALLY THE SAME VELOCITY AS THE MEANS CIRCULAR VELOCITY ATTAINED BY SAID TREATING LIQUID SO THAT SAID TREATING LIQUID AND TROUGH ARE SUBSTANTIALLY FREE FROM VELOCITY GRADIENTS WITH RESPECT TO EACH OTHER, DEPOSITING SAID TOW IN SAID RING TROUGH RADIALLY THEREOF AND IN A ZIG-ZAG MANNER, AND WITHDRAWING THE THUS TREATED TOW AFTER THE DESIRED PERIOD OF TREATMENT HAS ELAPSED.
Claim 2
Independent Claim
122 words
A METHOD FOR TREATING WITHOUT TANGLING A CONTINOUS TOW OF ARTIFICIAL WET SPUN PROTEIN FILAMENTS BY IMMERSION THEREOF IN A TREATING LIQUID FOR A RELATIVELY LONG PERIOD OF TIME, SAID METHOD COMPRISING THE STEPS CONTINUOUSLY FLOWING THE TREATING LIQUID THROUGH THE TROUGH PORTION OF A HORIZONTALLY DISPOSED, ROTATABLE RING TROUGH, ROTATING SAID TROUGH IN A HORIZONTAL PLANE ABOUT ITS CENTRAL AXIS AT SUBSTANTIALLY THE SAME VELOCITY AS THE MEANS CIRCULAR VELOCITY ATTAINED BY SAID TREATING LIQUID SO THAT SAID TREATING LIQUID AND TROUGH ARE SUBSTANTIALLY FREE FROM VELOCITY GRADIENTS WITH RESPECT TO EACH OTHER, DEPOSITING SAID TOW IN SAID RING TROUGH RADIALLY THEREOF AND IN A ZIG-ZAG MANNER, AND WITHDRAWING THE THUS TREATED TOW AFTER THE DESIRED PERIOD OF TREATMENT HAS ELAPSED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |