Method for fabricating a plastic optic element injection mold
CA 2435215 A1 · Owner: Kilroy, P. Clinton · Inventors: Kilroy, P. Clinton; Puchammer, Julius T.; Saccomanno J. Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to produce precision optic elements using injection molded plastic a , metal mold is fabricated from two positive masters comprising exact metallic reproductions of the desired plastic part and on which a metal shell (51) has been electroformed or otherwise plated. Two positive masters are required for each mold, one being formed to define the upper part of the mold and the other the lower part of the mold. Each positive master is scribed with an axial line (52) and with a cutting line slightly offset from the axial line (52) and the cutting line for the lower part of the mold being above the axial cutting line. The positive masters are then cut along their cutting linesm …
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 January 15, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 2024.
- 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.