US3328685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ohmmeter utilizing field-effect transistor as a constant current source
Assignee: HP Inc
•
Filing: 1964-04-07
•
Granted: 1967-06-27
•
Expires: 1984-04-07
Abstract
No abstract record available.
Inventors
- 👤 William R Hewlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:40
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G01N; G01N15/00; G01N15/06; G01N15/0656; G01N27/00; G01N27/02; G01N27/04; G01N27/043; G01N27/60
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |