US2809369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog-to-digital converter
Assignee: Coleman Engineering Co Inc
•
Filing: 1953-01-29
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Granted: 1957-10-08
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Expires: 1973-01-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Feeney
- 👤 Ralph D Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:25
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/06; H03M1/0617
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1116440A
Cited
US2550411A
Cited
US2630562A
Cited
US2496585A
Cited
US2666912A
Cited
US2620981A
Cited
US2620980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |