US3025522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doppler-type direction-finder
Assignee: International Standard Electric Corp
•
Filing: 1959-04-14
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Granted: 1962-03-13
•
Expires: 1979-04-14
Abstract
No abstract record available.
Inventors
- 👤 Steiner Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:07
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14; G01S3/52; G01S3/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2586342A
Cited
US2651774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |