US2823771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extensible telescopic antenna
Assignee: Wilhelm Sihn jr KG
•
Filing: 1955-08-15
•
Granted: 1958-02-18
•
Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 Langheck Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:14
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/1207; H01Q1/1214; F; F16; F16B; F16B9/00; F16B9/05; F16B9/054; F16B9/056; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |