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US2807720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulated oscillator
Assignee: ABB Norden Holding AB
•
Filing: 1953-03-25
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Granted: 1957-09-24
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Expires: 1973-03-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:52
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/22; G01N27/223; G01N27/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2268872A
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US2379694A
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US2394018A
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US2442138A
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US2447248A
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US2424972A
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GB645084A
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US2523051A
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US2580670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |