US3031614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical measuring bridges
Assignee: WAYNE KERR LAB Ltd
•
Filing: 1959-01-09
•
Granted: 1962-04-24
•
Expires: 1979-01-09
Abstract
No abstract record available.
Inventors
- 👤 Calvert Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:57
CPC Classifications
G; G01; G01R; G01R17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE42047C
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US2476496A
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GB630858A
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GB622130A
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FR58255E
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US2554164A
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US2942467A
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GB735917A
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GB738526A
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US2908166A
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US2866337A
Cited
FR1113985A
Cited
US2886774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |