US2537481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio antenna
Assignee: WALTER J SMITH JR
•
Filing: 1948-07-01
•
Granted: 1951-01-09
•
Expires: 1968-07-01
Abstract
No abstract record available.
Inventors
- 👤 Frederick L Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:23
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/10; H01Q1/103; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20474; Y10T74/20516
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1683911A
Cited
US1911234A
Cited
US2130993A
Cited
US2365886A
Cited
US2343684A
Cited
US2366634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |