Patent US2686882A successfully refreshed from Google Patents.
US2686882A
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Rotation stressed piezoelectric apparatus
Assignee: Individual
•
Filing: 1952-01-28
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Granted: 1954-08-17
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Expires: 1972-01-28
Abstract
No abstract record available.
Inventors
- 👤 George E Mallinckrodt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:17
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/18; F; F23; F23Q; F23Q2/00; F23Q2/28; F23Q2/285; F23Q2/287; F23Q3/00; F23Q3/002; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/1836
Claims Analysis
Total Claims: 0
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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) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |