Patent US1894687A successfully refreshed from Google Patents.
US1894687A
Expired / Lapsed
US
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Piezo-electric crystal temperature control
Assignee: Eclipse Aviation Corp
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Filing: 1930-12-08
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Granted: 1933-01-17
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Expires: 1950-12-08
Abstract
No abstract record available.
Inventors
- 👤 Lawrence A Hyland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
H; H03; H03L; H03L1/00; H03L1/02; H03L1/04
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) | 1936-01-17 | 1936-07-18 | 1937-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-01-17 | 1940-07-18 | 1941-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-01-17 | 1944-07-18 | 1945-01-17 | $7700.00 | Window Closed / Lapsed |