Fri, 08/27/2021 - 16:21
Missing CPC codes for re-issued patents
Hi PatentsView team,
I've noticed when I query re-issued patents from the API, their CPC codes returned "null." For instance, the following query returns "null" for CPC codes.
However, when I searched these patents on patft.uspto.gov, they have valid CPC codes. The patent in the query above has CPC codes F25B 13/00 (20130101); F25B 39/00 (20130101).