Patent US3071838A successfully refreshed from Google Patents.
US3071838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heat treating thermoplastic yarns
Assignee: Ernest Scragg and Sons Ltd
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Filing: 1959-04-13
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Granted: 1963-01-08
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Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 Scragg Ernest Philip Rushton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:49
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/001; D; D01; D01D; D01D10/00; D01D10/02; D01D10/04; D01D10/0436; D01D10/0481
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A HEATING APPARATUS FOR HEATING TRAVELLING YARNS, IN COMBINATION, AN ELONGATED HEATING MEMBER HAVING A LONGITUDINAL, CONVEXLY CURVED HEATING SURFACE ADAPTED TO BE CONTACTED BY YARN TRAVELLING LONGITUDINALLY OF SAID SURFACE; AND ELONGATED HEAT INSULATING MEANS AT LEAST AS LONG AS SAID HEATING MEMBER FORMED WITH A LONGITUDINAL CUTOUT IN WHICH THE ENTIRE HEATING MEMBER IS LOCATED EXTENDING LONGITUDINALLY OF SAID INSULATING MEANS, THE LATTER HAVING AT SAID CUTOUT THEREOF A CONFIGURATION WHICH FORMS WITH SAID HEATING SURFACE AN ELONGATED PASSAGE WHICH FROM ONE TO THE OTHER OF THE ENDS OF SAID HEAT INSULATING MEANS BECOMES FIRST GRADUALLY SMALLER IN CROSS-SECTION AND THEN GRADUALLY LARGER IN CROSS-SECTION, SAID PASSAGE HAVING ITS MINIMUM CROSS-SECTION BETWEEN THE ENDS OF SAID HEAT INSULATING MEANS, ALL OF THE CROSS-SECTIONS OF SAID PASSAGE BEING CIRCULAR.
Claim 2
Dependent Claim
131 words
IN A HEATING APPARATUS FOR HEATING TRAVELLING YARNS, IN COMBINATION, AN ELONGATED HEATING MEMBER HAVING A LONGITUDINAL, CONVEXLY CURVED HEATING SURFACE ADAPTED TO BE CONTACTED BY YARN TRAVELLING LONGITUDINALLY OF SAID SURFACE; AND ELONGATED HEAT INSULATING MEANS AT LEAST AS LONG AS SAID HEATING MEMBER FORMED WITH A LONGITUDINAL CUTOUT IN WHICH THE ENTIRE HEATING MEMBER IS LOCATED EXTENDING LONGITUDINALLY OF SAID INSULATING MEANS, THE LATTER HAVING AT SAID CUTOUT THEREOF A CONFIGURATION WHICH FORMS WITH SAID HEATING SURFACE AN ELONGATED PASSAGE WHICH FROM ONE TO THE OTHER OF THE ENDS OF SAID HEAT INSULATING MEANS BECOMES FIRST GRADUALLY SMALLER IN CROSS-SECTION AND THEN GRADUALLY LARGER IN CROSS-SECTION, SAID PASSAGE HAVING ITS MINIMUM CROSS-SECTION BETWEEN THE ENDS OF SAID HEAT INSULATING MEANS, ALL OF THE CROSS-SECTIONS OF SAID PASSAGE BEING CIRCULAR.
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |