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US3002072A
Expired / Lapsed
US
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Arc-quenching compound and electrical equipment utilizing same
Assignee: Pyle National Co
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Filing: 1959-02-12
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Granted: 1961-09-26
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Expires: 1979-02-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Nava
- 👤 William E Exner
- 👤 Irwin R Levinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:10
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2157883A
Cited
US2557642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |