1. Bayer Aktiengesellschaft (35 from 12,157 patents)

2. Mobay Chemical Corporation (1 from 191 patents)

3. Bayer Aktiengesesellschaft (1 from 1 patent)

1. 5684180 - Fractionation and purification of aromatic polyamine mixtures and the

2. 5679840 - Fractionation and purification of aromatic polyamine mixtures and the

3. 5679841 - Fractionation and purification of aromatic polyamine mixtures and the

4. 5675035 - Fractionation and purification of aromatic polyamine mixtures and the

5. 5672737 - Fractionation and purification of mixtures of aromatic polyamines and

6. 5663424 - Fractionation and purification of aromatic polyamine mixtures and the

7. 5648520 - Fractionation and purification of aromatic polyamine and the use thereof

8. 5648519 - Fractionation and purification of aromatic polyamine mixtures and the

9. 5359141 - Process for the production of polynuclear aromatic polyamines

10. 5196591 - Process for the production of polynuclear aromatic polyamines

11. 5043471 - Process for the preparation of polyisocyanates

12. 4924028 - Process for the production of polynuclear aromatic polyamines

13. 4914236 - Process for the preparation of multinuclear aromatic polyamines

14. 4879408 - Cycloaliphatic diisocyanates optionally in the form of isomer mixtures

15. 4879409 - Cycloaliphatic diisocyanates, optionally in the form of isomeric