Ice drilling system
CA 1238894 A · Owner: Mobil Oil Corporation · Inventors: Reichman, James M.; Kolle, Jack J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus is disclosed for drilling in ice wherein a rotating annular shaped head selectively melts a horizontal path into a large mass of densely packed ice masses such as an iceberg. The drill may be used to split icebergs or to serve as an anchor for a tow line or signal transmitter.
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 July 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 5, 2005.
- 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.