US2806185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase and amplitude testing apparatus
Assignee: Government of Netherlands
•
Filing: 1955-04-05
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Granted: 1957-09-10
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Expires: 1975-04-05
Abstract
No abstract record available.
Inventors
- 👤 Roelof M M Oberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:18
CPC Classifications
G; G01; G01R; G01R25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2541276A
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US2454781A
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US2676286A
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US2582676A
Cited
US2683214A
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US2684479A
Cited
US2731519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |