US3113224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature quartz piezoelectric devices
Assignee: AT&T Inc
•
Filing: 1961-06-21
•
Granted: 1963-12-03
•
Expires: 1981-06-21
Abstract
No abstract record available.
Inventors
- 👤 James C King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:16
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; H03H3/04; 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
29 words
A PIEZOELECTRIC DEVICE COMPRISING A QUARTZ CRYSTAL WHICH HAS BEEN SUBJECTED TO AN ELECTRIC FIELD OF AT LEAST 500 VOLTS/CM. AT A TEMPERATURE OF AT LEAST 400*C. FOR A
Claim 2
Dependent Claim
29 words
A PIEZOELECTRIC DEVICE COMPRISING A QUARTZ CRYSTAL WHICH HAS BEEN SUBJECTED TO AN ELECTRIC FIELD OF AT LEAST 500 VOLTS/CM. AT A TEMPERATURE OF AT LEAST 400*C. FOR A
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) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |