US3183126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making magnetic transducers
Assignee: Physical Sciences Corp
•
Filing: 1960-04-19
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Granted: 1965-05-11
•
Expires: 1980-04-19
Abstract
No abstract record available.
Inventors
- 👤 Gerald R Curtis
- 👤 James C Kyle
- 👤 Robinson Glen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:17
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/22; G01D5/2208; G01D5/2216; G01D5/2006; G01D5/2013; H; H01; H01F; H01F29/00; H01F29/08; H01F29/10; H01F41/00; H01F41/02; H01F41/0206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A METHOD OF MAKING A MAGNETIC CORE HAVING SUBSTANTIALLY CONSTANT MAGNETIC CHARACTERISTICS OVER AN EXTENDED TEMPERATURE RANGE, INCLUDING THE STEPS OF, REPEATEDLY THERMOSHOCKING A PIECE OF FERROMAGNETIC CHROMIUMIRON ALLOY OF THE AISI 400 SERIES BETWEEN AN ELEVATED TEMPERATURE OF AT LEAST 1000*F. FOR A LEAST ONE HOUR AND A REDUCED TEMPERATURE LESS THAN -200*F. FOR AT LEAST FIVE (5) MINUTES TO REMOVE CRYSTALLINE STRESSES IN THE ALLOY, THEN MACHINING THE PIECE OF MATERIAL TO THE REQUIRED SIZE OF THE CORE, AND THEN THERMOSHOCKING THE MACHINED PIECED BETWEEN AN ELEVATED TEMPERATURE OF AT LEAST 1000*F. FOR AT LEAST ONE HOUR AND A REDUCED TEMPERATURE LESS THAN -200*F. FOR AT LEAST FIVE (5) MINUTES TO REMOVE STRESSES DUE TO THE MACHINING.
Claim 2
Independent Claim
119 words
A METHOD OF MAKING A MAGNETIC CORE HAVING SUBSTANTIALLY CONSTANT MAGNETIC CHARACTERISTICS OVER AN EXTENDED TEMPERATURE RANGE, INCLUDING THE STEPS OF, REPEATEDLY THERMOSHOCKING A PIECE OF FERROMAGNETIC CHROMIUMIRON ALLOY OF THE AISI 400 SERIES BETWEEN AN ELEVATED TEMPERATURE OF AT LEAST 1000*F. FOR A LEAST ONE HOUR AND A REDUCED TEMPERATURE LESS THAN -200*F. FOR AT LEAST FIVE (5) MINUTES TO REMOVE CRYSTALLINE STRESSES IN THE ALLOY, THEN MACHINING THE PIECE OF MATERIAL TO THE REQUIRED SIZE OF THE CORE, AND THEN THERMOSHOCKING THE MACHINED PIECED BETWEEN AN ELEVATED TEMPERATURE OF AT LEAST 1000*F. FOR AT LEAST ONE HOUR AND A REDUCED TEMPERATURE LESS THAN -200*F. FOR AT LEAST FIVE (5) MINUTES TO REMOVE STRESSES DUE TO THE MACHINING.
References Cited (Backward Citations)
US2234002A
Cited
US2382654A
Cited
US2400842A
Cited
US2469137A
Cited
US2624688A
Cited
GB643367A
Cited
US2796003A
Cited
US2756170A
Cited
US2819957A
Cited
US3052576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |