Zip so why can't Amphastar start at the same place Sanofi does and end at the same place too would that violate Sanofi patents?
It is very different to take a recipe and make a product than to take that product, reverse-engineer it and prove it is the same. IF in the process of reverse-engineering and proof of sameness Amphastar/TEVA used the MNTA patented process then it could lead to blocking the launch* or a court ordered royalty for the use of the patent.
ij
* Of course, negotiated settlements are also possible.
It is astonishing what foolish things one can temporarily believe if one thinks too long alone ... where it is often impossible to bring one's ideas to a conclusive test either formal or experimental. J.M. Keynes