Patent US2496351A successfully refreshed from Google Patents.
Patent US1762712A successfully refreshed from Google Patents.
Patent US2718634A successfully refreshed from Google Patents.
US2718634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital-to-analogue converter
Assignee: Raytheon Co
•
Filing: 1951-07-28
•
Granted: 1955-09-20
•
Expires: 1971-07-28
Abstract
No abstract record available.
Inventors
- 👤 Hansen Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:26
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/06; H03M1/0617
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE493517C
Cited
US2537427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |