US3070788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital-to-analog converters
Assignee: Unisys Corp
•
Filing: 1958-12-16
•
Granted: 1962-12-25
•
Expires: 1978-12-16
Abstract
No abstract record available.
Inventors
- 👤 Howard E Tompkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:14
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/66; H03M1/661; H03M1/12; H03M1/22; H03M1/24; H03M1/245
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2445682A
Cited
US2661899A
Cited
US2853694A
Cited
US2869115A
Cited
US2784396A
Cited
US2881418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |