US2916681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment of ferroelectric materials
Assignee: AT&T Inc
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Filing: 1955-11-08
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Granted: 1959-12-08
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Expires: 1975-11-08
Abstract
No abstract record available.
Inventors
- 👤 George W Brady
- 👤 Steward S Flaschen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:59
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; G; G11; G11C; G11C11/00; G11C11/21; G11C11/22; H; H01; H01B; H01B1/00; H01B1/06; H01B1/08; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1638; H01G; H01G7/00; H01G7/02; H01G7/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A SINGLE CRYSTAL OF FERROELECTRIC MATERIAL SUBJECT TO DECAY ON PULSING HAVING ON ITS SURFACE AN ADHERENT THIN LAYER OF INSULATING, SUBSTANTIALLY ELECTROCHEMICALLY INERT, NON-FERRELECTRIC MATERIAL WHICH IS A MEMBER OF THE CLASS CONSISTING OF METAL OXIDES AND METAL FLUORIDES, WHICH LAYERS RENDERS THE UNDERLYING FERROELECTRIC MATERIAL RESISTANT TO DECAY ON PULSING.
Claim 2
Dependent Claim
52 words
A SINGLE CRYSTAL OF FERROELECTRIC MATERIAL SUBJECT TO DECAY ON PULSING HAVING ON ITS SURFACE AN ADHERENT THIN LAYER OF INSULATING, SUBSTANTIALLY ELECTROCHEMICALLY INERT, NON-FERRELECTRIC MATERIAL WHICH IS A MEMBER OF THE CLASS CONSISTING OF METAL OXIDES AND METAL FLUORIDES, WHICH LAYERS RENDERS THE UNDERLYING FERROELECTRIC MATERIAL RESISTANT TO DECAY ON PULSING.
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) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |