Patent US3086280A successfully refreshed from Google Patents.
US3086280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing of soft magnetic materials
Assignee: AT&T Inc
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Filing: 1959-06-18
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Granted: 1963-04-23
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Expires: 1979-06-18
Abstract
No abstract record available.
Inventors
- 👤 William B Gibbs
- 👤 Charles V Wahl
- 👤 Jr Daniel H Wenny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:16
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/143; C; C21; C21D; C21D8/00; C21D8/12; C22; C22F; C22F1/00; C22F1/10; H01F1/0302; H01F1/0304; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
THE METHOD OF FABRICATING A MAGNETIC MEMORY ELMENT UTILIZING A SOFT MAGNETIC TAPE HAVING A MINIMUM COERCIVE FORCE OF APPROXIMATELY 3 OERSTEDS; COMPRISING THE SUCCESSIVE STEPS OF COLD-DRAWING A BODY OF SOFT MAGNETIC MATERIAL COMPRISING NICKEL TO PRODUCE A WIRE, SAID COLD-DRAWING CAUSING AN INCREASE IN BOTH THE COERCIVE FORCE AND SQUARENESS OF THE HYSTERESIS LOOP OF SAID BODY OF SOFT MAGNETIC MATERIAL, HEAT TREATING SAID COLD-DRAWIN WIRE AT A TEMPERATURE IN THE RANGE OF FROM 100*C. UP TO ABOUT 900*C. FOR ONE SECOND TO 24 HOURS, THE SHORTER TIMES CORRESPONDING WITH THE HIGHER RANGES OF TEMPERATURE, THE TEMPERATURES AND TIMES OF SAID HEAT TREATMENT BEING SO INTERRELATED AS TO REQUIRE A MINIMUM TIME OF ONE SECOND AND A MAXIMUM TIME OF FOUR SECONDS FOR THE TEMPERATURE RANGE OF 700*C. UP TO ABOUT 900*C. AND A HEAT TREATMENT OF 24 HOURS AT 100*C., FURTHER COLDDRAWING SAID WIRE, SO AS TO REDUCE ITS DIAMETER A MINIMUN OF 5 PERCENT, AND FLATTENING SAID COLD-DRAWN WIRE TO FORM A TAPE AND WINDING THE COLD-WORKED TAPE SO PRODUCED WITHOUT ANNEALING AROUND A CONDUCTOR TO FORM A MAGNETIC MEMORY ELEMENT.
Claim 2
Independent Claim
185 words
THE METHOD OF FABRICATING A MAGNETIC MEMORY ELMENT UTILIZING A SOFT MAGNETIC TAPE HAVING A MINIMUM COERCIVE FORCE OF APPROXIMATELY 3 OERSTEDS; COMPRISING THE SUCCESSIVE STEPS OF COLD-DRAWING A BODY OF SOFT MAGNETIC MATERIAL COMPRISING NICKEL TO PRODUCE A WIRE, SAID COLD-DRAWING CAUSING AN INCREASE IN BOTH THE COERCIVE FORCE AND SQUARENESS OF THE HYSTERESIS LOOP OF SAID BODY OF SOFT MAGNETIC MATERIAL, HEAT TREATING SAID COLD-DRAWIN WIRE AT A TEMPERATURE IN THE RANGE OF FROM 100*C. UP TO ABOUT 900*C. FOR ONE SECOND TO 24 HOURS, THE SHORTER TIMES CORRESPONDING WITH THE HIGHER RANGES OF TEMPERATURE, THE TEMPERATURES AND TIMES OF SAID HEAT TREATMENT BEING SO INTERRELATED AS TO REQUIRE A MINIMUM TIME OF ONE SECOND AND A MAXIMUM TIME OF FOUR SECONDS FOR THE TEMPERATURE RANGE OF 700*C. UP TO ABOUT 900*C. AND A HEAT TREATMENT OF 24 HOURS AT 100*C., FURTHER COLDDRAWING SAID WIRE, SO AS TO REDUCE ITS DIAMETER A MINIMUN OF 5 PERCENT, AND FLATTENING SAID COLD-DRAWN WIRE TO FORM A TAPE AND WINDING THE COLD-WORKED TAPE SO PRODUCED WITHOUT ANNEALING AROUND A CONDUCTOR TO FORM A MAGNETIC MEMORY ELEMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |