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US2724820A
Expired / Lapsed
US
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Step-function output measuring device
Assignee: Individual
•
Filing: 1952-05-15
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Granted: 1955-11-22
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Expires: 1972-05-15
Abstract
No abstract record available.
Inventors
- 👤 George E Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
G; G01; G01R; G01R17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2448783A
Cited
US1268712A
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US1406500A
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US2374439A
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US2443623A
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FR905272A
Cited
GB657031A
Cited
US2631778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |