Controlled rate adsorbent unit and method of fabrication thereof
US5009308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1989 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | Aug 9, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2259/40084
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A controlled rate adsorbent unit including an adsorbent and a heat-shrunk casing of porous material having a predetermined water vapor transmission rate encasing the adsorbent for prolonging the water vapor adsorption time of the adsorbent. The controlled rate adsorbent unit may be in the shape of a recording disc or it may be in the shape of a three-dimensional solid with the heat-shrunk casing stretched tightly thereover. A method of fabricating a controlled rate adsorbent unit including the steps of providing an adsorbent material, heating the adsorbent material to dry off moisture therefrom, providing a porous material having a controlled water vapor transmission rate, sealing the adsorbent material in a casing of the porous material, heat-shrinking the porous material about the adsorbent, and storing the sealed adsorbent material in a moisture barrier package.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.