US3697335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for annealing flexible metallic material
Assignee: Beta Instrument Co Ltd
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Filing: 1969-11-07
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Granted: 1972-10-10
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Expires: 1989-11-07
Abstract
Abstract D R A W I N G A METHOD AND APPARATUS FOR ANNEALING FLEXIBLE METALLIC MATERIAL IN WHICH THE MATERIAL IS PASSED BY MEANS OF AN ELECTRIC MOTOR THROUGH AN ANNEALING DEVICE. A LENGTH OF THE MATERIAL IS FORMED INTO A LOOP AND SHORT CIRCUITED TO FORM A SHORTED SINGLE TURN SECONDARY OF AN INDUCTION COIL SO THAT INDEED CURRENT IN THE MATERIAL HEATS AND ANNEALS IT. THE TENSION IN THE MATERIAL IS CONTROLLED BY A DEVICE WHICH DETECTS CHANGES IN TENSION AND WHICH IS COUPLED TO TWO IDENTICAL CONTROL CIRCUITS CONTROLLING THE SPEED OF THE MOTOR.
Inventors
- 👤 John Kyriakis
- 👤 Walter Roland Tole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:43
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; C; C21; C21D; C21D9/00; C21D9/08; C21D9/52; C21D9/54; C21D9/56; C21D9/60; G05D5/00; G05D5/02; G05D5/03; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |