US3412331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Random sampling voltmeter
Assignee: HP Inc
•
Filing: 1965-04-29
•
Granted: 1968-11-19
•
Expires: 1985-04-29
Abstract
No abstract record available.
Inventors
- 👤 John T Boatwright
- 👤 Fred W Wenninger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:37
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/0046; G01R19/0053; G01R13/00; G01R13/20; G01R13/22; G01R13/34; G01R19/02; G01R19/04; G01R19/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2362898A
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US2356617A
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US2459730A
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US2459104A
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US2671874A
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US3193771A
Cited
US3278846A
Cited
US3191072A
Cited
US3268830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |