Patent US2869115A successfully refreshed from Google Patents.
US2869115A
Expired / Lapsed
US
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Direct current to digital coding and decoding system
Assignee: Individual
•
Filing: 1953-03-23
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Granted: 1959-01-13
•
Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Doeleman Henry
- 👤 Robert B Bonney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:24
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2539623A
Cited
US2538615A
Cited
US2715678A
Cited
US2717994A
Cited
US2754503A
Cited
US2731631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |