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US2995667A
Expired / Lapsed
US
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Transmission line driver
Assignee: International Business Machines Corp
•
Filing: 1957-12-23
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Granted: 1961-08-08
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Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 Genung L Clapper
- 👤 Robert L Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:40
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/0175; H03K19/018; H03K19/01825
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2252613A
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US2246331A
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US2256084A
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US2801296A
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US2842624A
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US2803758A
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US2839619A
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US2860196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |