Patent US2248215A successfully refreshed from Google Patents.
US2248215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio direction and distance indicating system
Assignee: AT&T Inc
•
Filing: 1940-06-20
•
Granted: 1941-07-08
•
Expires: 1960-06-20
Abstract
No abstract record available.
Inventors
- 👤 Horace T Budenbom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:17
CPC Classifications
G; G01; G01S; G01S11/00; G01S11/02
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) | 1944-07-07 | 1945-01-06 | 1945-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-07 | 1949-01-06 | 1949-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-07 | 1953-01-06 | 1953-07-08 | $7700.00 | Window Closed / Lapsed |