C09B 5/56
Preparation from starting materials already containing the indanthrene nucleus
C09B5/56 (Preparation from starting materials already containing the indanthrene nucleus) appears on 3 US grants and 2 published applications in this corpus.
Search patents in C09B- Granted patents
- 3
- Published applications
- 2
- Assignees
- 4
- Inventors
- 10
- Latest grant
- 8 Nov 2005
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Sulfoderivatives of indanthrone, lyotropic liquid crystal system and anisotropic film on their base8 Nov 2005US 6,962,734 B2Nitto Denko Corporation
- Method for thermostable and lightfast dichroic light polarizers16 Jan 2001US 6,174,394 B1Optiva, Inc.
- Method and materials for thermostable and lightfast dichroic light polarizers14 Apr 1998US 5,739,296 ARussian Technology Group
Most cited
By later US patents
- Method and materials for thermostable and lightfast dichroic light polarizers82US 5,739,296 ARussian Technology Group · 1998
- Method for thermostable and lightfast dichroic light polarizers54US 6,174,394 B1Optiva, Inc. · 2001
- Sulfoderivatives of indanthrone, lyotropic liquid crystal system and anisotropic film on their base17US 6,962,734 B2Nitto Denko Corporation · 2005