Patent US2489223A successfully refreshed from Google Patents.
US2489223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anticollision apparatus
Assignee: LAFAYETTE M HUGHES
•
Filing: 1946-06-25
•
Granted: 1949-11-22
•
Expires: 1966-06-25
Abstract
No abstract record available.
Inventors
- 👤 Robert J Herbold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:08
CPC Classifications
G; G01; G01S; 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)
US1542937A
Cited
US1546264A
Cited
US2013594A
Cited
US1963185A
Cited
US2016036A
Cited
US1983882A
Cited
US2114163A
Cited
US2206036A
Cited
GB518211A
Cited
US2350820A
Cited
US2390739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |