Filter element for espresso makers
US5447631A · kind A · utility
18Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1994 |
| Grant date | Sep 5, 1995 |
| Priority date | — |
| Expiry date | Sep 19, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J31/0663
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A permanent filter for coffee grind in an espresso maker includes a pot-shaped filter element having a bottom including several relief slots. The relief slots each have a width smaller than a mean diameter of particles of the coffee grind and a length which is a multiple of the mean diameter of the particles of coffee grind. The use of this permanent filter element accomplishes uniformly satisfactory espresso results independently of the type of coffee used, the fineness of grind and the dust content of the ground coffee.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.