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Patent US3149232A successfully refreshed from Google Patents.
US3149232A
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Stabilizing piezoelectric ceramics
Assignee: Clevite Corp
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Filing: 1959-08-31
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Granted: 1964-09-15
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Expires: 1979-08-31
Abstract
No abstract record available.
Inventors
- 👤 Jaffe Hans
- 👤 Helmut H A Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:26
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/51; C04B35/01; C04B35/46; C04B35/48; C04B35/50; H; H10; H10N; H10N30/00; H10N30/01; H10N30/04; H10N30/09; H10N30/093; H10N30/097; H10N30/80; H10N30/85; H10N30/853; H10N30/8548; H10N30/8554
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A METHOD OF IRRADIATION AGING PIEZOPELECTRIC CERAMIC MATERIALS WHICH COMPRISES EXPOSING SUCH MATERIALS TO A SOURCE OF GAMMA RADIATRION, THE INTENSITY OF THE RADIATION AND TIME OF EXPOSURE BEING SUFFICIENT TO IMPART TO THE MATERIAL A RADIATION DOSAGE OF FROM 10**4 TO 10**9 ROENTGENS.
Claim 2
Independent Claim
44 words
A METHOD OF IRRADIATION AGING PIEZOPELECTRIC CERAMIC MATERIALS WHICH COMPRISES EXPOSING SUCH MATERIALS TO A SOURCE OF GAMMA RADIATRION, THE INTENSITY OF THE RADIATION AND TIME OF EXPOSURE BEING SUFFICIENT TO IMPART TO THE MATERIAL A RADIATION DOSAGE OF FROM 10**4 TO 10**9 ROENTGENS.
References Cited (Backward Citations)
US2563503A
Cited
GB278347A
Cited
US2437913A
Cited
GB743584A
Cited
GB812056A
Cited
US3001880A
Cited
US3005096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |