US2680241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position indication device
Assignee: Individual
•
Filing: 1949-06-02
•
Granted: 1954-06-01
•
Expires: 1969-06-02
Abstract
No abstract record available.
Inventors
- 👤 Darrin H Gridley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:03
CPC Classifications
H; H03; H03M; H03M1/00; G; G01; G01S; G01S1/00; G01S1/02; H03M1/12; H03M1/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2110746A
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US2089441A
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US2168149A
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US2332775A
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US2397604A
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US2332300A
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US2431591A
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US2370176A
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US2370134A
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US2420509A
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US2485245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |