Patent US3457510A successfully refreshed from Google Patents.
US3457510A
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US
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Modified duobinary data transmission
Assignee: LENKURT ELECTRIC CO Inc
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Filing: 1966-02-18
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Granted: 1969-07-22
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Expires: 1986-02-18
Abstract
No abstract record available.
Inventors
- 👤 Adam Lender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:47
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/497; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3337864A
Cited
US3388330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |