Vitreous cutter
CA 2067481 A1 · Owner: Domash, David M. · Inventors: Charles, Steven T.; Tyler, Hugh J.; Tyler, Hugh J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vitreous cutter comprising a housing having an internal transverse bore and a longitudinal bore which, intersects the transverse bore; a pair of inlets at one end of the housing for allowing pressurized air to be introduced into the transverse bore; a piston having a toothed longitudinal, slot slideably mounted in the transverse bore; a stationary outer cutting tube; a rotatable inner cutting tube telescopically received in the outer cutting tube; a flexible seal between the inner cutting tube and the outer cutting tube; and a pinion gear on a medial section of the inner cutting tube that is received in the piston slot. The pinion gear is arranged to rotate the inner cutting tube …
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
- Filed April 28, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2014.
- 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.