Bit for removing damaged screws
CA 2401284 A1 · Owner: Bergamo, Peter J. · Inventors: Bergamo, Peter J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This bit is installed in a counter-clockwise-rotating drill. The bit has an axis and a tip end (14) with a point of about 140~. There are multiple scraping surfaces (20) on the bit, each facing conter-clockwise into a longitudinal recess (18) in the tip end. Each scraping surface (20) has a scraping edge at an angle of about 70~ to the axis. Behind the scraping surfaces (20) the outer surface of the tip end curves down in a relief surface to a rearward edge adjacent another of the longitudinal recess (18).
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 February 23, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 23, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 2023.
- 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.