Patent US3543167A successfully refreshed from Google Patents.
US3543167A
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US
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Differential frequency measuring device
Assignee: US Philips Corp
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Filing: 1967-08-15
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Granted: 1970-11-24
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Expires: 1987-08-15
Abstract
No abstract record available.
Inventors
- 👤 Scato Albarda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:20
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/22; H03K5/26; G; G01; G01R; G01R25/00; G05; G05B; G05B2219/00; G05B2219/30; G05B2219/37; G05B2219/37176; G05B2219/41; G05B2219/41464
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2617939A
Cited
US3078415A
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US2933682A
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US3011150A
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US2911641A
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US3297947A
Cited
US3354398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |