Odor-absorbing materials and processes for their preparation and use
US8950360B2 · kind B2 · utility
3Cited by
111References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2013 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Mar 11, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C44/54
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A slightly puffed, low density, moisture-absorbing and odor-absorbing additive that can readily remove undesirable odors from a confined space is produced from re-purposed spent carbon materials obtained from other processes. The product is particularly suitable as an addition to animal litters and the like with possible uses in human applications. An aspect of the method includes a step of extruding a spent carbon mixture, optionally containing diatomaceous earth to obtain the additive. Also disclosed are de-germinated corn flour, or grits, that aid process flow and can serve as a substrate for the spent carbon materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.