US3029022A
Expired / Lapsed
US
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Apparatus for determining the ratio between two d. c. power sources
Assignee: United States Steel Corp
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Filing: 1959-03-03
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Granted: 1962-04-10
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Expires: 1979-03-03
Abstract
No abstract record available.
Inventors
- 👤 Horvath Charles
- 👤 Adam F Lukasik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:09
CPC Classifications
G; G01; G01B; G01B21/00; G01B21/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |