Patent US2824921A successfully refreshed from Google Patents.
US2824921A
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Speed change warning system
Assignee: Individual
•
Filing: 1955-02-02
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Granted: 1958-02-25
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Expires: 1975-02-02
Abstract
No abstract record available.
Inventors
- 👤 William M Baumheckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:55
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/44; B60Q1/441
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1858243A
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US2128769A
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US2435389A
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US2452762A
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US2442971A
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US2499297A
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US2685005A
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US2707214A
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US2750462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |