Patent US3231663A successfully refreshed from Google Patents.
US3231663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic shield having multiple electroconductive passages
Assignee: Individual
•
Filing: 1962-11-01
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Granted: 1966-01-25
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Expires: 1982-11-01
Abstract
No abstract record available.
Inventors
- 👤 Schwartz Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:39
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
AN ELECTROMAGNETIC SHIELD, COMPRISING A RECTANGULAR GRILLE PANEL, A CORE FOR SAID PANEL INCLUDING A PLURALITY OF AXIALLY PARALLEL PASSAGES EXTENDING THERETHROUGH AND DEFINED BY OPPOSING SMOOTH WALLS, SAID CORE BEING FORMED OF ELECTRICALLY NONCONDUCTIVE PLASTIC MATERIAL IMPREGNATED THROUGHOUT WITH SUFFICIENT PARTICLES OF ELECTRICALLY CONDUCTIVE MATERIAL TO RENDER SAID CORE ELECTRICALLY CONDUCTIVE ON ALL SURFACES THEREOF, SO THAT SAID PASSAGES CONSTITUTE WAVE GUIDE FILTERS TO PREVENT PASSAGE OF ELECTROMAGNETIC WAVES OF CERTAIN FREQUENCIES THERETHROUGH WHILE FREELY PASSING AIR AND LIGHT.
Claim 2
Dependent Claim
80 words
AN ELECTROMAGNETIC SHIELD, COMPRISING A RECTANGULAR GRILLE PANEL, A CORE FOR SAID PANEL INCLUDING A PLURALITY OF AXIALLY PARALLEL PASSAGES EXTENDING THERETHROUGH AND DEFINED BY OPPOSING SMOOTH WALLS, SAID CORE BEING FORMED OF ELECTRICALLY NONCONDUCTIVE PLASTIC MATERIAL IMPREGNATED THROUGHOUT WITH SUFFICIENT PARTICLES OF ELECTRICALLY CONDUCTIVE MATERIAL TO RENDER SAID CORE ELECTRICALLY CONDUCTIVE ON ALL SURFACES THEREOF, SO THAT SAID PASSAGES CONSTITUTE WAVE GUIDE FILTERS TO PREVENT PASSAGE OF ELECTROMAGNETIC WAVES OF CERTAIN FREQUENCIES THERETHROUGH WHILE FREELY PASSING AIR AND LIGHT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |