US2444388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for indicating direction and distance
Assignee: Hartford National Bank and Trust Co
•
Filing: 1938-12-29
•
Granted: 1948-06-29
•
Expires: 1958-12-29
Abstract
No abstract record available.
Inventors
- 👤 Vries Gerrit De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:31
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2011392A
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US1988020A
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US2045072A
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US1924156A
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US1924174A
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US1982271A
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US2099300A
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US2085798A
Cited
FR809012A
Cited
US2143035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |