I think if you do a search on plant patents and schlumbergera, you can sort of narrow down which ones are patented. There are websites that list the information about patented plants. I believe I also read that a plant patent expires after 20 years, so the early Cobia hybrids such as Red Radiance are no longer under patent and have entered public domain.
Even so, there are people selling plants on ebay that ARE under a patent. I don't know if they know the ramifications if they are caught or not, but they are doing it.
Plant patents do not extend to the use of the plant as breeding stock. You may use any plant that is patented as a pod or pollen parent, which is good.
None of my plants will be patented. I just don't see the need to do it, and I have no way of enforcing it.
