Patent US1603792A successfully refreshed from Google Patents.
US1603792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio accessory
Assignee: ANTON M JOHNSON
•
Filing: 1925-09-10
•
Granted: 1926-10-19
•
Expires: 1945-09-10
Abstract
No abstract record available.
Inventors
- 👤 O'sullivan Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:41
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/544
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1929-10-18 | 1930-04-19 | 1930-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-10-18 | 1934-04-19 | 1934-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-10-18 | 1938-04-19 | 1938-10-19 | $7700.00 | Window Closed / Lapsed |