For those who have interest in my original post concerning the Blc. Pamela Hetherington 'Coronation' FCC/AOS, here is updated and correct information.
Plant patents filed/registered before 1996 had a seventeen year expiration period and one cannot renew/extend/re-file for that patent after the seventeen year period expires. Thus this patent has expired and the plant is now considered to be public-domain. I can do whatever I want with this plant.
This information was obtained from the PhD who files plant/material patents and researches patents for the Mississippi State University Research and Technology Center. I would assume this expert on plant patents knows his business.
If I learn something new every day, I consider that to be a good day.