Patent US3331400A successfully refreshed from Google Patents.
US3331400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible waveguide
Assignee: Electronic Specialty Co
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Filing: 1964-01-22
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Granted: 1967-07-18
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Expires: 1984-01-22
Abstract
No abstract record available.
Inventors
- 👤 Hugo L Vilkaitis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:19
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/12; H01P3/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A FLEXIBLE METAL WAVEGUIDE WHICH COMPRISES A CONTINUOUS STRIP OF CONDUCTIVE MATERIAL, SAID STRIP HAVING A GENERALLY U-SHAPED CROSS-SECTION WITH FIRST AND SECOND FLANGES OUTWARDLY EXTENDING THEREFROM, SAID FIRST FLANGE FORMING A LONGITUDINAL RECESS HAVING AN OPENING FACING THE CENTER OF SAID STRIP, AND SAID SECOND FLANGE HAVING A LIP MEMBER FOR INSERTION IN SAID RECESS, SAID LIP MEMBER
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |