US2489254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio system
Assignee: Individual
•
Filing: 1944-01-04
•
Granted: 1949-11-29
•
Expires: 1964-01-04
Abstract
No abstract record available.
Inventors
- 👤 Otto F A Arnold
- 👤 David A Breister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:46
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711636A
Cited
US2115813A
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GB410549A
Cited
US2024816A
Cited
US2023458A
Cited
US2096874A
Cited
US2152515A
Cited
US2227598A
Cited
US2153052A
Cited
US2237457A
Cited
US2371397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |