Patent US2698401A successfully refreshed from Google Patents.
US2698401A
Expired / Lapsed
US
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Direct reading range mark circuit
Assignee: Gilfillan Bros Inc
•
Filing: 1951-02-17
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Granted: 1954-12-28
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Expires: 1971-02-17
Abstract
No abstract record available.
Inventors
- 👤 Korelich Pete
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:07
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S7/22; G01S1/00; G01S1/02; G01S7/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2422204A
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US2449848A
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US2477615A
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US2512923A
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US2444036A
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US2543434A
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US2589860A
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US2551681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |