Patent · US Expired

Method for treating used or exhausted photographic fixing solution

US4073705A · kind A · utility

5Cited by

3References

2Claims

0Family size

Assignee

The Agency of Industrial Science and Technology · JP

Inventors

Eiichi Torikai · Yao, JP
Youji Kawami · Kawachinagano, JP

Key dates

Filing date	Oct 12, 1976
Grant date	Feb 14, 1978
Priority date	—
Expiry date	Oct 12, 1996

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25B1/00
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Removal of silver and reduction of COD value in used or exhausted photographic fixing solution are effectively conducted by electrolysis of reversing repeatedly polarity of positive and negative electrodes.

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