US1561597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio apparatus
Assignee: Barkelew Electric Manufacturing Co
•
Filing: 1924-06-16
•
Granted: 1925-11-17
•
Expires: 1944-06-16
Abstract
No abstract record available.
Inventors
- 👤 Charles W Denny
- 👤 William E Mclaughlin
- 👤 Helwig George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:28
CPC Classifications
H; H01; H01R; H01R24/00; H01R24/86; H01R13/00; H01R13/02; H01R13/15; H01R13/187; H01R2107/00; H01R2201/00; H01R2201/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-11-16 | 1929-05-18 | 1929-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-11-16 | 1933-05-18 | 1933-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-11-16 | 1937-05-18 | 1937-11-17 | $7700.00 | Window Closed / Lapsed |