Patent US2573291A successfully refreshed from Google Patents.
US2573291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic station indicating device
Assignee: Zenith Electronics LLC
•
Filing: 1949-06-16
•
Granted: 1951-10-30
•
Expires: 1969-06-16
Abstract
No abstract record available.
Inventors
- 👤 Otto E Wagenknecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:57
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/02; H03J1/04; H03J1/045; Y; Y10; Y10S; Y10S40/00; Y10S40/901
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |