US3453464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillating resonator
Assignee: HB ENG CORP
•
Filing: 1968-03-19
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Granted: 1969-07-01
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Expires: 1988-03-19
Abstract
No abstract record available.
Inventors
- 👤 Hugh M Baker Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:58
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/0504; H02; H02K; H02K33/00; H02N; H02N11/00; H02N11/006; H03H9/24; H03H9/46; H03H9/48; H03H9/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2838696A
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US2838695A
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US2978597A
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US3091708A
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US2939971A
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US3113463A
Cited
US3372351A
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US3277394A
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US3308313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |