Patent US2440587A successfully refreshed from Google Patents.
US2440587A
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US
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Curb guiding signal
Assignee: Individual
•
Filing: 1943-06-28
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Granted: 1948-04-27
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Expires: 1963-06-28
Abstract
No abstract record available.
Inventors
- 👤 Michael J Krall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:55
CPC Classifications
B; B60; B60Q; B60Q9/00; B60Q9/002; B60Q9/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR742482A
Cited
US1363658A
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US1293532A
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US1393968A
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US1709400A
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US1925612A
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GB494424A
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US2302283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |