Microwave package with vent
US4404241A · kind A · utility
52Cited by
14References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1979 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Dec 19, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3192
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Multilayered sheet material, a method for producing said material and a package comprising said material are provided. The multilayered material and package produced therefrom have apertures sealed with an extrudable hot melt material which conveys moisture barrier properties and is adapted to soften and permit venting of vapor generated in the package prior to distortion of the package. The packages are adapted particularly for use as containers or as components thereof when used in heating or cooking of foods in microwave ovens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.