Spill-proof closure
US5186347A · kind A · utility
66Cited by
17References
20Claims
0Family size
Inventors
Key dates
| Filing date | Oct 15, 1991 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Oct 15, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47G19/2272
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A spill-proof closure for containers used in dispensing liquid beverages. The closure has a spout containing a thin membrane at or near the upper end. The thin membrane includes a through slit which remains closed except when external suction is applied during normal drinking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.