Patent US2849628A successfully refreshed from Google Patents.
US2849628A
Expired / Lapsed
US
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Variable frequency crystal device
Assignee: Individual
•
Filing: 1953-06-12
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Granted: 1958-08-26
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Expires: 1973-06-12
Abstract
No abstract record available.
Inventors
- 👤 Hans E Hollmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:58
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; H03H3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2260707A
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US2321285A
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US2306555A
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US2390048A
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US2461307A
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US2526207A
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US2719223A
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US2555959A
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US2508720A
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US2663006A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |