Dropper tip for dispensing a liquid, in particular eye drops
CA 2031632 A1 · Owner: Laboratoires Merck Sharp & Dohme-Chibret · Inventors: Mazuel, Claude; Chalmin, Patrice G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dropper tip for dispensing a liquid in, particular eye drops. The invention relates to a dropper tip comprising a circularly cylindrical body whose top portion has a narrow central channel flaring slightly all the way to a calibrated outlet orifice. The outside surface (116) of the top portion (106) of the tip is terminated by a hemispherical portion (112) that is directly connected to the side surface (107) of the central channel (107) at a small diameter (D) circular outlet orifice (109), said hemispherical portion enabling a drop to be formed which is essentially constant in size for a given liquid regardless of the tilt angle of the flask when the drop is delivered. The invention is …
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 December 6, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 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.