US2983866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic impedance plotting device
Assignee: Individual
•
Filing: 1957-03-22
•
Granted: 1961-05-09
•
Expires: 1977-03-22
Abstract
No abstract record available.
Inventors
- 👤 Alford Andrew
- 👤 Jr Chester B Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:10
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/28; G01R27/32; G01R27/02; G01R27/04; G01R27/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735064A
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US2735981A
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US2462841A
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US2790143A
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US2508456A
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US2594167A
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US2789271A
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US2554164A
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US2667576A
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US2609447A
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US2688694A
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US2754480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |