Patent US1856505A successfully refreshed from Google Patents.
US2435615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Object detecting and locating system
Assignee: BOARD
•
Filing: 1941-09-30
•
Granted: 1948-02-10
•
Expires: 1961-09-30
Abstract
No abstract record available.
Inventors
- 👤 Russell H Varian
- 👤 William W Hansen
- 👤 John R Woodyard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:32
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE21955E
Cited
US1238220A
Cited
US1428353A
Cited
US1750668A
Cited
GB302602A
Cited
US1932469A
Cited
US2045072A
Cited
US2045071A
Cited
US2085798A
Cited
US2178074A
Cited
GB472891A
Cited
US2231929A
Cited
US2237792A
Cited
US2248442A
Cited
US2223224A
Cited
US2268643A
Cited
US2236893A
Cited
US2261272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-09 | 1951-08-11 | 1952-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-09 | 1955-08-11 | 1956-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-09 | 1959-08-11 | 1960-02-10 | $7700.00 | Window Closed / Lapsed |