Color changing umbrella
US6196241A · kind A · utility
28Cited by
11References
21Claims
0Family size
Inventor
Key dates
| Filing date | May 19, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | May 19, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA45B25/18
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention relates to an umbrella where the canopy is dyed with a color changing dye. The dye may be thermochromic, changing colors as the temperature changes. Photochromic dyes, which change color in sunlight, may also be used. The dye may be applied to the panels to form a variety of images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.