US2463472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cavity resonator
Assignee: PREMIER CRYSTAL LAB Inc
•
Filing: 1945-03-16
•
Granted: 1949-03-01
•
Expires: 1965-03-16
Abstract
No abstract record available.
Inventors
- 👤 Henry M Bach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:29
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2106769A
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US2174701A
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US2233263A
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US2323201A
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US2374810A
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US2241976A
Cited
US2408425A
Cited
US2306282A
Cited
US2405277A
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 |