Patent · US Expired

Alkali metal alginate surface layer for heat development process

US4732839A · kind A · utility

1Cited by

6References

6Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Karl-Wilhelm Schranz · Langenfeld, DE
Gunther Schenk · Cologne, DE

Key dates

Filing date	Aug 29, 1986
Grant date	Mar 22, 1988
Priority date	—
Expiry date	Aug 29, 2006

Classification

Technology area (CPC G)Physics
CPC primaryG03C8/408
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Transfer images free from spots are obtained by the heat development process using a photographic recording material and a separate image receptor sheet if either the photothermographic recording material or the image receptor sheet or both contain a mixture of gelatine and sodium alginate in a surface contact layer.

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