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US3010067A
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Dual electrical instrument
Assignee: Daystrom Inc
•
Filing: 1959-03-09
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Granted: 1961-11-21
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Expires: 1979-03-09
Abstract
No abstract record available.
Inventors
- 👤 Alfred C Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:29
CPC Classifications
F; F21; F21V; F21V14/00; F21V14/08; G; G01; G01R; G01R1/00; G01R1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2183934A
Cited
US2875410A
Cited
US644859A
Cited
US2455167A
Cited
US2539143A
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US2840782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |