US2545567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective circuit arrangement
Assignee: Individual
•
Filing: 1947-08-06
•
Granted: 1951-03-20
•
Expires: 1967-08-06
Abstract
No abstract record available.
Inventors
- 👤 Bridges Donald Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:20
CPC Classifications
H; H04; H04J; H04J3/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB460488A
Cited
US2277000A
Cited
US2419570A
Cited
US2425314A
Cited
US2433667A
Cited
US2425315A
Cited
US2462896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |