Patent · US Expired

PH control of leachable mercury in fluorescent lamps

US5736813A · kind A · utility

12Cited by
4References
11Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 29, 1996
Grant dateApr 7, 1998
Priority date
Expiry dateNov 29, 2016

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01J61/72
  • WIPO fieldElectrical machinery, apparatus, energy
  • WIPO sectorElectrical engineering

Abstract

The formation of leachable mercury upon disposal or during TCLP testing of mercury vapor discharge lamps is substantially prevented by incorporation of a pH control agent in the lamp structure or in the test solution to provide a pH of about 5.5 to about 6.5.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.