Patent US4026563A successfully refreshed from Google Patents.
Patent US3304599A successfully refreshed from Google Patents.
US3304599A
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US
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Method of manufacturing an electromagnet having a u-shaped core
Assignee: AT&T Teletype Corp
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Filing: 1965-03-30
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Granted: 1967-02-21
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Expires: 1985-03-30
Abstract
No abstract record available.
Inventors
- 👤 Robert W Nordin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:13
CPC Classifications
H; H01; H01F; H01F3/00; H01F3/06; H01F7/00; H01F7/06; H01F7/08; H01F7/081; Y; Y10; Y10S; Y10S174/00; Y10S174/13; Y10S174/14; Y10S174/24; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T29/49073; Y10T29/49075; Y10T29/49078; Y10T29/49826; Y10T29/49908; Y10T29/49915
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
51 words
A METHOD OF MAKING AN ELECTROMAGNET INCLUDING THE STEPS OF: ENCLOSING A COIL OF CONDUCTIVE MATERIAL IN A TOROID OF CONTINUOUS MAGNETIC WIRE; AND CUTTING THE ANNULUS IN A PLANE SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF THE COIL SO THAT THE COIL IS SUBSTANTIALLY SURROUNDED BY U-SHAPED WIRES OF MAGNETIC MATERIAL.
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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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |