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US2686301A
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Electrical signal indicating system
Assignee: Individual
•
Filing: 1947-07-31
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Granted: 1954-08-10
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Expires: 1967-07-31
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Bailey
- 👤 Frank E J Girling
- 👤 John W Pletts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:17
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2076229A
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US2086904A
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US2230243A
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US2292045A
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US2405238A
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US2373997A
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US2416355A
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US2448762A
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US2465113A
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US2453454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |