Veterinary devices
CA 1330744 C · Owner: Pfizer Limited · Inventors: Grimshaw, William Thomson Ross; Weatherly, Andrew John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a device for administration of veterinary preparations for ruminant animals, such as cattle and sheep. The device comprises a sheet of flexible material containing a medicament and capable of slow release of the medicament within the rumen. The sheet is rolled or folded into a tube configuration and constrained in that configuration by means releasable on contact with rumen fluid so that the sheet may unroll or unfold after insertion in the rumen and remain there. The ends of the tube formed by the sheet are provided with closing means allowing the unrolling or unfolding of the sheet in the rumen. The closing means keeps the tube ends closed during the administration of the …
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 19, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 19, 2011.
- 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.