US3428884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear voltage variable resistance networks
Assignee: Weston Instruments Inc
•
Filing: 1966-08-01
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Granted: 1969-02-18
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Expires: 1986-08-01
Abstract
No abstract record available.
Inventors
- 👤 John G Nordahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:46
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0052
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2958831A
Cited
US3296520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |