US3071841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of longitudinally pre-polarizing bodies consisting of at least one layer of piezoelectric material
Assignee: US Philips Corp
•
Filing: 1958-02-13
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Granted: 1963-01-08
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Expires: 1978-02-13
Abstract
No abstract record available.
Inventors
- 👤 Brussaard Jan Maarten
- 👤 Hekkert Jan Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:48
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01G7/025; H01G7/026; H04; H04R; H04R17/00; H10; H10N; H10N30/00; H10N30/01; H10N30/04; H10N30/045; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD OF POLARIZING A CERAMIC, PIEZOELECTRIC BODY COMPRISING DISPOSING ON A FIRST SURFACE OF THE BODY A PLURALITY OF SPACED, PARALLEL ELECTRODES; DISPOSING ON A SECOND SURFACE OPPOSITE THE FIRST SURFACE OF THE BODY A PLURALITY OF SPACED, PARALLEL ELECTRODES ALTERNATELY DISPOSED TO BE BETWEEN THE ELECTRODES ON THE FIRST SURFACE OF SAID BODY; INTERCONNECTING THE ELECTRODES ON THE FIRST SURFACE OF SAID BODY AND CONNECTING SAID INTERCONNECTED ELECTRODES TO ONE POLE OF A POLARIZING VOLTAGE SOURCE; INTERCONNECTING THE ELECTRODES ON THE SECOND SURFACE AND CONNECTING SAID INTERCONNECTED ELECTRODES TO THE OTHER POLE OF SAID POLARIZING VOLTAGE SOURCE, THEREBY TO ESTABLISH MAINLY WITHIN THE BODY AND AWAY FROM THE SURFACE A LONGITUDINALLY ALTERNATING POLARIZING FIELD; AND APPLYING SAID POLARIZING VOLTAGE TO SAID ELECTRODES WHILE SAID BODY IS DISPOSED IN A GASEOUS MEDIUM HAVING A RELATIVELY HIGH VALUE OF ELECTRICAL BREAKDOWN INTENSITY.
Claim 2
Independent Claim
142 words
A METHOD OF POLARIZING A CERAMIC, PIEZOELECTRIC BODY COMPRISING DISPOSING ON A FIRST SURFACE OF THE BODY A PLURALITY OF SPACED, PARALLEL ELECTRODES; DISPOSING ON A SECOND SURFACE OPPOSITE THE FIRST SURFACE OF THE BODY A PLURALITY OF SPACED, PARALLEL ELECTRODES ALTERNATELY DISPOSED TO BE BETWEEN THE ELECTRODES ON THE FIRST SURFACE OF SAID BODY; INTERCONNECTING THE ELECTRODES ON THE FIRST SURFACE OF SAID BODY AND CONNECTING SAID INTERCONNECTED ELECTRODES TO ONE POLE OF A POLARIZING VOLTAGE SOURCE; INTERCONNECTING THE ELECTRODES ON THE SECOND SURFACE AND CONNECTING SAID INTERCONNECTED ELECTRODES TO THE OTHER POLE OF SAID POLARIZING VOLTAGE SOURCE, THEREBY TO ESTABLISH MAINLY WITHIN THE BODY AND AWAY FROM THE SURFACE A LONGITUDINALLY ALTERNATING POLARIZING FIELD; AND APPLYING SAID POLARIZING VOLTAGE TO SAID ELECTRODES WHILE SAID BODY IS DISPOSED IN A GASEOUS MEDIUM HAVING A RELATIVELY HIGH VALUE OF ELECTRICAL BREAKDOWN INTENSITY.
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |