System and method for identifying and correcting computer operations involving two digit year dates
CA 2230752 A1 · Owner: Burgess, Allen G. · Inventors: Burgess, Allen G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for identifying and correcting computer operations involving two digit year dates. The system includes: a computer and a routine for searching for a subtraction (20), comparison and sort operations on the computer involving a plurality of two digit quantities representing year dates. The subtraction operation (24) is executed to obtain a difference value between two quantities. A negative difference value is verified (26) and a plurality of two digit numbers whose sum is 100 is added to the negative difference value (28, 29) so that the subtraction operation yields a correct result for two digit quantities representing years greater than or equal to the year …
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 June 24, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 2019.
- 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.