PHOTOCHROMIC BIS-INDENOFUSED NAPHTHOPYRANS
- Application ID: EP12812161
- Status: █ NO OPPOSITION FILED WITHIN TIMELIMIT
This EP application has the IPC class C07 (ORGANIC CHEMISTRY) and G02 (OPTICS). We found, that TransMIT GmbH, Hoffmann Eitle PartmbB, Plougmann & Vingtoft A/S, m patent group, Gille Hrabal and 6 others are specialized in this combination either. For a similar patent, they might be a good choice.