Patent US3405440A successfully refreshed from Google Patents.
US3405440A
Expired / Lapsed
US
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Ferroelectric material and method of making it
Assignee: Motors Liquidation Co
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Filing: 1963-09-26
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Granted: 1968-10-15
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Expires: 1983-09-26
Abstract
No abstract record available.
Inventors
- 👤 James P Nolta
- 👤 Norman W Schubring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:25
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01G7/025; H01G7/026; C; C01; C01D; C01D9/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
THE METHOD OF MAKING A FERROELECTRIC DEVICE WHICH COMPRISES FORMING FROM A FERROELECTRIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF POTASSIUM NITRATE AND SODIUM NITRATE, A THIN FUSED FILM HAVING A THICKNESS LESS THAN ABOUT 0.02 INCH AND HAVING ITS FERROELECTRIC AXIS AT RIGHT ANGLES TO THE MAJOR SURFACE OF THE FILM, AND APPLYING ELECTRICAL CONTACTS TO OPPOSITE MAJOR SURFACES OF SAID FILM.
Claim 2
Independent Claim
63 words
THE METHOD OF MAKING A FERROELECTRIC DEVICE WHICH COMPRISES FORMING FROM A FERROELECTRIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF POTASSIUM NITRATE AND SODIUM NITRATE, A THIN FUSED FILM HAVING A THICKNESS LESS THAN ABOUT 0.02 INCH AND HAVING ITS FERROELECTRIC AXIS AT RIGHT ANGLES TO THE MAJOR SURFACE OF THE FILM, AND APPLYING ELECTRICAL CONTACTS TO OPPOSITE MAJOR SURFACES OF SAID FILM.
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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) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |