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US2742533A
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Assignee: North Electric Co
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Filing: 1951-05-15
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Granted: 1956-04-17
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Expires: 1971-05-15
Abstract
No abstract record available.
Inventors
- 👤 Maurice G Ryon
- 👤 Donald S Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:10
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/02; H04Q1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US516291A
Cited
US1267959A
Cited
US1541343A
Cited
US1553313A
Cited
US2107835A
Cited
US2530354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |