US3238592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for heating and stretching yarn
Assignee: Celanese Canada Inc
•
Filing: 1964-05-25
•
Granted: 1966-03-08
•
Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 Killoran Irene Agnes Buchanan
- 👤 Claude J Cornmier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:52
CPC Classifications
D; D02; D02J; D02J13/00; D01; D01D; D01D10/00; D01D10/02; D01D5/00; D01D5/12; D01D5/16; D02J1/00; D02J1/22; D02J1/224
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
A HEATING DEVICE FOR USE IN STRETCHING THERMOPLASTIC SYNTHETIC YARNS INCLUDING A LONGITUDINALLY CURVED TAPERED METALLIC HEATING ELEMENT HAVING A CONVEX SURFACE OVER WHICH THE YARN IS MOVED CONTINUALLY UNDER TENSION AND IN CLOSE CONTACT WITH SAID SURFACE, SAID CONVEX SURFACE HAVING A CHROMIUM-PLATED, VAPOUR-BLASTED MIRROR FINISH HAVING BLAST CRATERS RANGING FROM ABOUT 3 MICRONS TO ABOUT 8 MICRONS IN DEPTH AND SPACED FROM CENTER TO CENTER WITHIN THE RANGE FROM ABOUT 10 TO ABOUT 50 MICRONS, SAID SURFACE REDUCING FRICTIONAL RESISTANCE TO THE YARN SUBSTANTIALLY TO A MINIMUM, AND ELECTRICAL TERMINALS FOR SUPPLYING HEATING CURRENT TO SAID ELEMENT THEREBY TO HEAT SAID ELEMENT BY RESISTANCE.
References Cited (Backward Citations)
US1576621A
Cited
US2509741A
Cited
US2596327A
Cited
US2627182A
Cited
US2661521A
Cited
US2780047A
Cited
GB772346A
Cited
US2820876A
Cited
US2891375A
Cited
US2807863A
Cited
US3091912A
Cited
US2864229A
Cited
US3069745A
Cited
US3071838A
Cited
US2932078A
Cited
US3020177A
Cited
US3132462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |