Voltage dividing shielded door seal
CA 1254988 A · Owner: Merewether, David E. · Inventors: Merewether, David E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an electromagnetic shielded door seal which will block both low frequency electromagnetic waves as well as very high frequency electromagnetic waves. The sealing effectiveness of the door seal which may be used for a shielded enclosure is improved by, introducing a high frequency impedance between the two coacting surfaces of the door seal. The door seal is provided with two cooperating members which move relative to one another. At least one of the members contains a small cavity therein which is filled with a dielectric or lossy material. The periphery surrounding the cavity is closed with, the exception of a small gap ensuring communication between the material provided …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 30, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 30, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.