US2980905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio ranging device
Assignee: Individual
•
Filing: 1948-12-16
•
Granted: 1961-04-18
•
Expires: 1968-12-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Gratian
- 👤 Anne C Gratian
- 👤 Robert T Nieset
- 👤 Marlan E Bourns
- 👤 Horace R Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:56
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/93; G01S13/933
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2288554A
Cited
US2431344A
Cited
US2428799A
Cited
GB581982A
Cited
US2422382A
Cited
US2443619A
Cited
US2415093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |