Method for providing enlarged prints of color transparencies and negatives
CA 2024726 A1 · Owner: Kobel, John O. · Inventors: Kobel, John O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a system for producing a full color enlarged reproduction of a color transparency or negative (3) on a photographic paper. The system makes use of a continuous tone scanner (1) having a given contrast range to produce enlarged color separation negatives of the original transparency or negative (3) on a continuous tone photographic film (5). Prior to producing these enlarged color separation negatives, the continuous tone scanner (1) is adjusted to condensate its contrast range to accommodate the photographic paper. The color separation negatives that are so obtained may be used, after development, for producing the requested full color enlarged reproduction on the photographic …
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 September 6, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 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.