I was looking to patent an invention I feel to have novelty, but I came across this one pre-existing US patent while doing some research. It was filed over 20 years ago and has since "lapsed". ...
Why would somebody allow such a valuable patent as USP6293874 to lapse for non-payment of maintenance fees?
I had a very similiar idea with a few small production changes but would have had the same use. Would this patent stop me from legally producing a similiar item and what are the legal consequences? ...
US6148942 "Infant stroller safely propelled by DC electronic motor" According to Google Patents the 6148942 patent is status Lapsed and according to Public PAIR its status is Expired as of 2008. ...