Patent US2550787A successfully refreshed from Google Patents.
US2550787A
Expired / Lapsed
US
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Electrical testing apparatus
Assignee: Individual
•
Filing: 1946-11-05
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Granted: 1951-05-01
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Expires: 1966-11-05
Abstract
No abstract record available.
Inventors
- 👤 Richard L Dedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:59
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/50; G01R31/64; G01R19/00; G01R19/0092
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US731209A
Cited
US1251440A
Cited
US1560278A
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US1986414A
Cited
US1983665A
Cited
US2134059A
Cited
US2373156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |