Method for continuous and maskless patterning of structured substrates
CA 2315026 A1 · Owner: Minnesota Mining And Manufacturing Company · Inventors: Pokorny, Richard; Padiyath, Raghunath; Moshrefzadeh, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of selectively patterning a structured substrate without using a mask is disclosed. The method includes the steps of providing a surface having a plurality of protrusions, coating the surface with a filler material thick enough so that the protrusions are covered and planarizing the filler , coating. The filler material is thereafter partially removed in a uniform fashion to expose only those portions of the protrusions to be modified. After modifying the protrusions by, for example deposition or etching, the , remaining filler material may be removed resulting in a structured substrate , selectively modified or patterned at its protrusions.
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 May 4, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 2020.
- 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.