Floor underlayment that allows water flow therethrough in only one direction
US11447962B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 2020 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Dec 27, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F15/203
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A floor underlayment includes a fiber pad and a vapor barrier layer. The fiber pad includes reinforcement fibers and thermoplastic binder fibers binding the reinforcement fibers together. The vapor barrier layer has a bottom surface attached to the fiber pad, a top surface opposite of the bottom surface, and a matrix of holes extending through the top and bottom surfaces thereof. The holes are configured to allow moisture to flow through the holes in a downward direction from the top surface of the vapor barrier layer to the bottom surface of the vapor barrier layer while inhibiting water flow through the holes in an upward direction opposite of the downward direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.