Patent US2589249A successfully refreshed from Google Patents.
US2589249A
Expired / Lapsed
US
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Direction and distance finding equipment
Assignee: International Standard Electric Corp
•
Filing: 1941-03-07
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Granted: 1952-03-18
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Expires: 1961-03-07
Abstract
No abstract record available.
Inventors
- 👤 Hardy Rene Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:16
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1831465A
Cited
US2130912A
Cited
US2083495A
Cited
US2212110A
Cited
US2227598A
Cited
US2536728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |