US2963549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for correcting electrical signal distortion
Assignee: International Business Machines Corp
•
Filing: 1958-07-07
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Granted: 1960-12-06
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Expires: 1978-07-07
Abstract
No abstract record available.
Inventors
- 👤 Warren A Christopherson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:43
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2048080A
Cited
US2298930A
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US2341649A
Cited
US2629776A
Cited
US2715677A
Cited
US2697816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |