Sustained release biocidal powders
US5888528A · kind A · utility
55Cited by
37References
65Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | May 19, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A powder for sustained release of a gas including a hydrophilic core, a hydrophobic layer on an outer surface of the hydrophilic core, and particles in contact with the hydrophobic layer. The hydrophobic layer contains an acid releasing agent. The particles contain an anhydrous material capable of binding with water. The core, the particles, and the hydrophobic layer are substantially free of water, and the core is capable of generating and releasing a gas after hydrolysis of the acid releasing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.