Phenothiazine in prill form and method for making the same
US6284279A · kind A · utility
5Cited by
11References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1999 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Dec 3, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K15/30
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Phenothiazine and its derivatives products are provided with a minimal level of fines or dust as a result of forming such products in prill form. The prills are generally spherical. Also provided is a method for reducing the level of powder in phenothiazine product which includes forming the phenothiazine product in prill form such that the prills have a generally spherical shape. The prill product achieves improved handling, flowability and dissolution times, while minimizing the generation of phenothiazine fines and dust, and the problems associated with worker exposure, irritation and sensitization to such fines and dust.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.