US1455141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio receiving apparatus
Assignee: Individual
•
Filing: 1922-03-27
•
Granted: 1923-05-15
•
Expires: 1942-03-27
Abstract
No abstract record available.
Inventors
- 👤 Percival D Lowell
- 👤 Francis W Dunmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:24
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1607; H04B1/1623
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) | 1926-05-14 | 1926-11-13 | 1927-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-05-14 | 1930-11-13 | 1931-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-05-14 | 1934-11-13 | 1935-05-15 | $7700.00 | Window Closed / Lapsed |