Flat paper sheet item for distributing a thin layer of material
US4890872A · kind A · utility
49Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1989 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | Mar 20, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/903
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A relatively flat packet for distributing thin layers of material, which provide a substantial recess so as to limit the possibility of contact with surfaces that could impair the integrity of the layer of material enclosed in the packet item from smearing and abrasion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.