US2873439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital to analog converting apparatus
Assignee: Consolidated Electrodynamics Corp
•
Filing: 1954-07-06
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Granted: 1959-02-10
•
Expires: 1974-07-06
Abstract
No abstract record available.
Inventors
- 👤 Arvo A Lahti
- 👤 Duncan N Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:37
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/66; H03M1/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2124906A
Cited
US2476673A
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US2630481A
Cited
US2685054A
Cited
US2685084A
Cited
US2676289A
Cited
US2792545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |