US1685810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for rendering visible oscillations of piezoelectrical crystals
Assignee: Individual
•
Filing: 1926-06-08
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Granted: 1928-10-02
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Expires: 1946-06-08
Abstract
No abstract record available.
Inventors
- 👤 Giebe Erich
- 👤 Scheibe Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:43
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/10; H03H9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-10-02 | 1932-04-02 | 1932-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-02 | 1936-04-02 | 1936-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-02 | 1940-04-02 | 1940-10-02 | $7700.00 | Window Closed / Lapsed |