US2823351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage ratio indicator
Assignee: Individual
•
Filing: 1945-11-14
•
Granted: 1958-02-11
•
Expires: 1965-11-14
Abstract
No abstract record available.
Inventors
- 👤 Robert M Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:07
CPC Classifications
G; G05; G05B; G05B1/00; G05B1/01; G05B1/02; G05B1/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2293403A
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US1428156A
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US1727388A
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US2200863A
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US2129880A
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US2202885A
Cited
US2348177A
Cited
US2399695A
Cited
US2369138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |