Oilfield equipment identification apparatus
CA 2081908 C · Owner: Denny, Lawrence A. · Inventors: Denny, Lawrence A.; Perkin, Gregg S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for identifying oilfield equipment including the maintenance of , usage histories for the equipment and recommending whether the equipment is to be used in a prospective application based on prospective application and usage history. A portable encapsulated passive circuit (9) capable of transmitting art identification code is affixed to a piece of oilfield equipment (J). The circuit is activated by a portable reader (5) which receives and decodes the identification code and transmits it to a central computer. The central computer verifies the reader (5) and the existence of the equipment (J) in the database and retrieves the usage history for the equipment. Based on the …
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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 May 2, 1991 and granted July 23, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 2, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.