Forming solid, adhesive-free composite of membrane filters and cellulosic cardboard
US4042733A · kind A · utility
3Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 25, 1976 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | May 25, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31975
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A solid, adhesive-free, layered composite material consisting of two clearly defined layers, one made of membrane filters and the other of porous material, the said composite material being formed by bringing a polymeric membrane filter forming substance in its gel condition into contact with the porous material, and solidifying the said gel on the porous material; the composite material is useful as a nutrient medium carrier for microbiological tests.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.