Ultraviolet ray-shielding agent and tube
US5214345A · kind A · utility
14Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1991 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Jul 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ultraviolet ray-shielding agent for selectively shielding ultraviolet rays while allowing a transmission of visible rays therethrough, comprising a visible ray-transmitting binder and extremely fine zinc oxide particles having an average size of 0.1 .mu.m or less in a mixing ratio of the zinc oxide particles to the binder of 1/10 to 10/1, and an ultraviolet ray-shielding tube for visible ray-irradiation luminescent lamps comprising a transparent substrate tube for sealing a light emission source therein, and a coating formed on a surface of the substrate tube and comprising the above-mentioned ultraviolet ray-shielding agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.