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US3288695A
Expired / Lapsed
US
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Piezoelectric quartz crystal units
Assignee: AT&T Inc
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Filing: 1962-05-09
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Granted: 1966-11-29
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Expires: 1982-05-09
Abstract
No abstract record available.
Inventors
- 👤 James C King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:30
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; H03H3/04; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A METHOD FOR IMPROVING THE PIEZOELECTRIC PROPER TIES OF A SYNTHETIC QUARTZ CRYSTAL WHICH COMPRISES THE STEPS OF ELECTROLYZING THE CRYSTAL BY IMPRESSING AN ELECTRIC FIELD IN THE RANGE 500 VOLTS/CM. TO 10**6 VOLTS/CM. ACROSS THE CRYSTAL WHILE MAINTAINING IT AT A TEMPERATURE IN THE RANGE 350* C. TO 550* C., EXPOSING THE CRYSTAL TO HIGH ENERGY RADIATION OF BETWEEN 10**17 NVT AND 3.10**19
Claim 2
Independent Claim
64 words
A METHOD FOR IMPROVING THE PIEZOELECTRIC PROPER TIES OF A SYNTHETIC QUARTZ CRYSTAL WHICH COMPRISES THE STEPS OF ELECTROLYZING THE CRYSTAL BY IMPRESSING AN ELECTRIC FIELD IN THE RANGE 500 VOLTS/CM. TO 10**6 VOLTS/CM. ACROSS THE CRYSTAL WHILE MAINTAINING IT AT A TEMPERATURE IN THE RANGE 350* C. TO 550* C., EXPOSING THE CRYSTAL TO HIGH ENERGY RADIATION OF BETWEEN 10**17 NVT AND 3.10**19
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |