Infusion apparatus
CA 1114451 A · Owner: Pye (Electronic Products) Limited · Inventors: Ellson, Allan H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In apparatus for the automatic infusion of labour-inducing drugs during childbirth in which the, dose rate is steadily increased until a particular level of contraction activity is detected and then held constant, this constant rate can result in over-stimulation of labour. The improvement comprises the inclusion of a dose rate control system in which the duration and periodicity of the labour contractions are detected in the form of a pulse train from which a signal is produced by integration, which signal is representative of the average value of the mark-space ratio of the pulse train. This average value is compared with a predetermined value and the dose rate is increased or decreased …
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 December 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 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.
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.