Patent US2877457A successfully refreshed from Google Patents.
US2877457A
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Method and apparatus for presenting three-dimensional representation of voltages
Assignee: HARRY S NICHOLS
•
Filing: 1952-04-22
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Granted: 1959-03-10
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Expires: 1972-04-22
Abstract
No abstract record available.
Inventors
- 👤 Donald J Gimpel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:28
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2590230A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |