US1848630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezo electric crystal
Assignee: Individual
•
Filing: 1925-12-23
•
Granted: 1932-03-08
•
Expires: 1945-12-23
Abstract
No abstract record available.
Inventors
- 👤 Edward O Hulburt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:30
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; H03H3/04; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 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) | 1935-03-08 | 1935-09-07 | 1936-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-03-08 | 1939-09-07 | 1940-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-03-08 | 1943-09-07 | 1944-03-08 | $7700.00 | Window Closed / Lapsed |