Filters with odor-controlling compositions
US10307702B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 2017 |
| Grant date | Jun 4, 2019 |
| Priority date | — |
| Expiry date | Aug 11, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter is treated with a reduced amount of a halo active aromatic sulfanomide compound of Formula (I): wherein R1, R2, R3, R4, and R5 are independently selected from hydrogen, COOR′, CON(R″)2, alkoxy, CN, NO2, SO3R″, halogen, substituted or unsubstituted phenyl, sulfonamide, halosulfonamide, and substituted or unsubstituted C1-C12 alkyl; R′ is hydrogen, an alkali metal, an alkaline earth metal, substituted C1-C12 alkyl, or unsubstituted C1-C12 alkyl; and R″ is hydrogen or substituted or unsubstituted C1-C12 alkyl, where the two R″ groups in CON(R″)2 may be independently selected; X is halogen; M is an alkali or alkaline earth metal; and n is the number of water molecules per molecule of the sulfonamide compound. The compound effectively suppresses odors pre-use, in use, and post-use for extended periods of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.