US2463109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric element of p-type crystal
Assignee: Brush Development Co
•
Filing: 1944-06-08
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Granted: 1949-03-01
•
Expires: 1964-06-08
Abstract
No abstract record available.
Inventors
- 👤 Jaffe Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:49
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/15; H03H9/17; H03H9/02; H03H9/02007; H03H9/02015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20213E
Cited
USRE20680E
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US2105011A
Cited
US2170318A
Cited
US2188154A
Cited
US2292388A
Cited
US2309467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |