US2928048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical measuring system
Assignee: McGraw Edison Co
•
Filing: 1956-08-27
•
Granted: 1960-03-08
•
Expires: 1976-08-27
Abstract
No abstract record available.
Inventors
- 👤 Robert H Postal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:23
CPC Classifications
G; G01; G01R; G01R15/00; G01R15/14; G01R15/20; G01R15/202; H; H01; H01J; H01J31/00; H01J31/02; H01J31/04; Y; Y10; Y10S; Y10S310/00; Y10S310/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2087995A
Cited
US2059786A
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US2548176A
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US2551265A
Cited
US2605302A
Cited
US2720558A
Cited
US2736822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |