Sample tube cap
CA 1181037 A · Owner: Hoffmann-La Roche Limited · Inventors: Schmidhauser, Theodor; Naff, Rolf; Fanger, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This specification provides a simple closure device which is free from the disadvantages of the known closure devices but has the same reliability as that required in conventional devices of the same kind for use in ultra-centrifuges. The specification discloses a closure device for centrifuge test tubes comprising, an insertion piece extending partially from the opening into the interior of the test tube, whereby the outer diameter of the lower part of the portion to be inserted into the tube corresponds to the inner diameter of the tube. The upper portion of the insertion piece, which is substantially outside the tube, has an outer diameter greater than the inner diameter of the tube and …
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 January 15, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 2002.
- 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.