Visor-type mask for dentists
CA 1283752 C · Owner: Landis, Timothy J. · Inventors: Landis, Timothy J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mask to protect dentists from handpiece splatter which contains all manner of germs and viruses and has a visor which attaches to the head above the eyes and a transparent shield which extends down below the mouth. The shield is preferably detachable from the visor for cleaning and replacement. The visor has a vent for air circulation which may be closed by a cover for protection. A filter may be applied to the shield for eye protection when ultraviolet light is being used for curing plastic tooth cavity fillings.
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 7, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2008.
- 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.