US3273152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doppler vor beacon
Assignee: International Standard Electric Corp
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Filing: 1963-05-16
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Granted: 1966-09-13
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Expires: 1983-05-16
Abstract
No abstract record available.
Inventors
- 👤 Earp Charles William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:15
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/38; G01S1/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
RADIO BEACON EQUIPMENT INCLUDING A HOLLOW METAL CIRCULAR CYLINDER HAVING IN ITS CURVED SURFACE A ROW OF PARALLEL SLOTS CONSISTING A CIRCULAR ARRAY OF SLOTS ANTENNAS, MEANS TO FEED THE SLOTS ANTENNAS CYCLICALLY AND CONSECUTIVELY AROUND THE CIRCLE WITH A FIRST WAVE TRAIN, MEANS TO FEED THE ANTENNAS IN A SIMILAR ORDER WITH A SECOND WAVE
Claim 2
Dependent Claim
56 words
RADIO BEACON EQUIPMENT INCLUDING A HOLLOW METAL CIRCULAR CYLINDER HAVING IN ITS CURVED SURFACE A ROW OF PARALLEL SLOTS CONSISTING A CIRCULAR ARRAY OF SLOTS ANTENNAS, MEANS TO FEED THE SLOTS ANTENNAS CYCLICALLY AND CONSECUTIVELY AROUND THE CIRCLE WITH A FIRST WAVE TRAIN, MEANS TO FEED THE ANTENNAS IN A SIMILAR ORDER WITH A SECOND WAVE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |