In 1980, Charles Laleman of France received a US patent (No. 4,203,674) for a technique for making concrete by mixing together cement with blood. His patent described a variety of different recipes one could use to create this blood concrete...
None of the Cemex patents I can see involve blood in concrete. On the flip-side since the Charles Laleman patent expired, anyone is now free to sell product with blood in the concrete as specified by Laleman patent.
I cannot find that cemex owns this patent.
The use of blood to make concrete - Weird Universe
http://www.weirduniverse.net/blog/comments/blood_concrete
In 1980, Charles Laleman of France received a US patent (No. 4,203,674) for a technique for making concrete by mixing together cement with blood. His patent described a variety of different recipes one could use to create this blood concrete...
Patent link here:
https://patents.google.com/patent/US4203674A/en
Anticipated expiration: 1997-12-05
Status: Expired - Lifetime
Patents Assigned to Cemex, Inc.
https://patents.justia.com/assignee/cemex-inc
Patents Assigned to CEMEX Research Group AG - Justia
https://patents.justia.com/assignee/cemex-research-group-ag
None of the Cemex patents I can see involve blood in concrete. On the flip-side since the Charles Laleman patent expired, anyone is now free to sell product with blood in the concrete as specified by Laleman patent.