US3399348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
R. m. s. metering system
Assignee: Keithley Instruments LLC
•
Filing: 1964-04-08
•
Granted: 1968-08-27
•
Expires: 1984-04-08
Abstract
No abstract record available.
Inventors
- 👤 Praglin Julius
- 👤 Ronald F Shuster
- 👤 Thomas J Noveske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:02
CPC Classifications
G; G01; G01R; G01R21/00; G01R21/14; G01R21/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2081839A
Cited
US3213364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |