Odor-absorbing materials and processes for their preparation and use
US9339005B2 · kind B2 · utility
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7References
6Claims
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Assignee
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Key dates
| Filing date | Dec 30, 2014 |
| Grant date | May 17, 2016 |
| Priority date | — |
| Expiry date | Dec 30, 2034 |
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-adsorbing 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, of 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.