US2635147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone selector switch utilizing odd-even relay
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1948-10-25
•
Granted: 1953-04-14
•
Expires: 1968-10-25
Abstract
No abstract record available.
Inventors
- 👤 Stehlik Rudolph Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:17
CPC Classifications
H; H04; H04Q; H04Q3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1569936A
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US1849694A
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US1922237A
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US1924661A
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US1956371A
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US1914384A
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US2090522A
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US2289896A
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US2294907A
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US2416086A
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US2416109A
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US2458262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |