US3149408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of permanent magnetic structures
Assignee: General Electric Co
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Filing: 1962-08-09
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Granted: 1964-09-22
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Expires: 1982-08-09
Abstract
No abstract record available.
Inventors
- 👤 Richard B Falk
- 👤 George D Hooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:31
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/08; H01F1/083; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR THE PREPARATION OF PERMANENT MAGNETIC STRUCTURES COMPRISING ELECTRODEPOSITING FINE MAGNETIC PARTICLES INTO A MERCURY CATHODE TO FORM A SLURRY OF ELECTRODEPOSITED PARTICLES AND MERCURY, ADDING TO SAID SLURRY A VOLUME OF MATRIX MATERIAL NOT SUBSTANTIALLY LESS THAN THE VOLUME OF MERCURY IN SAID SLURRY, REMOVING THE MERCURY AND PRESSING THE PARTICLES AND MATRIX AT A TEMPERATURE ABOVE THE MELTING POINT OF THE MATRIX IN THE PRESENCE OF A D.C. FIELD TO REMOVE EXCESS MATRIX AND COMPACT INTO A MAGNETIC STRUCTURE.
Claim 2
Dependent Claim
83 words
A PROCESS FOR THE PREPARATION OF PERMANENT MAGNETIC STRUCTURES COMPRISING ELECTRODEPOSITING FINE MAGNETIC PARTICLES INTO A MERCURY CATHODE TO FORM A SLURRY OF ELECTRODEPOSITED PARTICLES AND MERCURY, ADDING TO SAID SLURRY A VOLUME OF MATRIX MATERIAL NOT SUBSTANTIALLY LESS THAN THE VOLUME OF MERCURY IN SAID SLURRY, REMOVING THE MERCURY AND PRESSING THE PARTICLES AND MATRIX AT A TEMPERATURE ABOVE THE MELTING POINT OF THE MATRIX IN THE PRESENCE OF A D.C. FIELD TO REMOVE EXCESS MATRIX AND COMPACT INTO A MAGNETIC STRUCTURE.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |