Expired Canadian patentCanada
Properties of crystals
CA 1100093 A · Owner: National Research Development Corporation · Inventors: Hudson, John A.; Nelson, Richard S.; Mazey, David J.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A diamond is toughened by bombarding it at elevated temperature with ions such as protons which form a dislocation network in it inhibiting microcleavage.
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 April 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 25, 1978
GrantedApril 28, 1981
Term endedApril 28, 1998
Patent numberCA 1100093 A
Classification (IPC)B01J19/08 +2 more
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.