Patent US2451822A successfully refreshed from Google Patents.
US2451822A
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US
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Distance and speed indicating system
Assignee: Radio Patents Corp
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Filing: 1945-02-15
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Granted: 1948-10-19
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Expires: 1965-02-15
Abstract
No abstract record available.
Inventors
- 👤 Guanella Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:48
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/583; G01S13/584; G01S1/00; G01S1/02; G01S13/06; G01S13/08; G01S13/32; G01S13/34; G01S13/343; G01S13/345
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1495616A
Cited
US1945952A
Cited
GB497147A
Cited
US2193361A
Cited
US2134716A
Cited
US2301929A
Cited
US2427219A
Cited
US2408742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |