Patent US3136965A successfully refreshed from Google Patents.
US3136965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic wave guide of lunate cross section
Assignee: Boeing Co
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Filing: 1960-09-22
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Granted: 1964-06-09
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Expires: 1980-09-22
Abstract
No abstract record available.
Inventors
- 👤 Lunden Clarence David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:27
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/12; H01P3/123
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
A GUIDE FOR ELECTROMAGNETIC WAVE ENERGY PROPAGATION COMPRISING AN ELONGATED TUBULAR MEMBER HAVING AN INTERIOR WALL OF HIGH ELECTRICAL CONDUCTIVITY, SAID WALL DEFINING A WAVE PROPAGATION SPACE OF SUBSTANTIALLY UNIFORM LUNATE CROSS-SECTIONAL FROM THROUGHOUT ITS LENGTH, AND MEANS COUPLING TO SAID GUIDE A SOURCE OF ELECTROMAGNETIC WAVE ENERGY TO BE PROPAGATED IN SAID SPACE ALONG THE GUIDE.
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |