Time delay perforating apparatus
CA 2024677 A1 · Owner: Haliburton Company · Inventors: George, Kevin R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A time delay perforating apparatus and method of use. The apparatus includes at least one first and second gun with a time delay device positioned therebetween. The time delay device delays firing of the second gun for a predetermined period after firing of the first gun and prevents fluid communication between the first and second guns. The time delay device is positioned in a housing interconnecting the first and second guns and closes off a central opening through the housing. The time delay device includes a body with a primer assembly, a firing pin for detonating the primer assembly, an ignition mix ignited by detonation of the primer assembly, a time delay mix triggered by ignition of …
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 September 5, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2012.
- 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.