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Class Information
Number: 503/219
Name: Record receiver having plural interactive leaves or a colorless color former, method of use, or developer therefor > Having a colorless color-former, developer therefor, or method of use > Identified color-former > And identified inorganic electron acceptor (developer), other than mere clay
Description: Subject matter in which a claim names an inorganic material other than clay, which has acid characteristics sufficient to bring out the color-former contacted therewith.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6387584 |
Photoimaging material |
May. 14, 2002 |
| 5350729 |
Developer sheet with structured clays and process thereof |
Sep. 27, 1994 |
| 5215956 |
Color changing print |
Jun. 1, 1993 |
| 5091280 |
Light- and heat-sensitive recording material |
Feb. 25, 1992 |
| 5087283 |
Sympathetic ink for ink jet printer |
Feb. 11, 1992 |
| 5070067 |
Heat-sensitive recording material |
Dec. 3, 1991 |
| 5013709 |
Pressure-sensitive recording paper and color developer therefor |
May. 7, 1991 |
| 4950330 |
Aqueous dispersion of a developer for pressure-sensitive recording sheet and a process for producing the same |
Aug. 21, 1990 |
| 4927802 |
Pressure-sensitive multi-part record unit |
May. 22, 1990 |
| 4917730 |
Prevention of spotting in thermal imaging compositions |
Apr. 17, 1990 |
| 4851384 |
Record material |
Jul. 25, 1989 |
| 4824825 |
Color developer sheet for pressure-sensitive recording |
Apr. 25, 1989 |
| 4794069 |
Spirobenzanthracene phthalide compounds, processes for preparing same and color forming recording materials containing said compounds |
Dec. 27, 1988 |
| 4732614 |
Novel correction compositions and process for using same |
Mar. 22, 1988 |
| 4720301 |
Reversible heat sensitive recording composition |
Jan. 19, 1988 |
| 4680597 |
Self-contained type pressure sensitive record sheet |
Jul. 14, 1987 |
| 4652512 |
Heat and light-sensitive recording materials with dialonium compound, coupler, and heat fusible amidine or diamidine compound |
Mar. 24, 1987 |
| 4642662 |
Carbonless paper for use in letter printers |
Feb. 10, 1987 |
| 4551739 |
Record member |
Nov. 5, 1985 |
| 4509065 |
Record material |
Apr. 2, 1985 |
| 4507670 |
Thermosensitive recording material |
Mar. 26, 1985 |
| 4486763 |
Thermosensitive recording material |
Dec. 4, 1984 |
| 4467337 |
Chemical carbonless copy paper |
Aug. 21, 1984 |
| 4462616 |
Record material |
Jul. 31, 1984 |
| 4461494 |
Pressure sensitive carbonless copying systems |
Jul. 24, 1984 |
| 4435002 |
Oxime ethers of 4,4'-bis(N,N-diethylamino)benzhydrol and pressure-sensitive recording systems containing them |
Mar. 6, 1984 |
| 4421344 |
Pressure-sensitive record color-developing sheet |
Dec. 20, 1983 |
| 4409272 |
Process for the manufacture of color developing material and product |
Oct. 11, 1983 |
| 4408781 |
Recording materials |
Oct. 11, 1983 |
| 4405371 |
Novel clay mineral color developer for pressure sensitive recording paper and process for producing same |
Sep. 20, 1983 |
| 4398753 |
Pressure sensitive recording unit |
Aug. 16, 1983 |
| 4379835 |
Black image from a thermographic imaging system |
Apr. 12, 1983 |
| 4343494 |
Carbonless copy paper system |
Aug. 10, 1982 |
| 4324817 |
Process for making carbonless copying paper |
Apr. 13, 1982 |
| RE30797 |
Associated dye salts and method of forming colored indicia therewith |
Nov. 17, 1981 |
| 4286017 |
Heat-sensitive recording paper |
Aug. 25, 1981 |
| 4254971 |
Pressure-sensitive record material and preparation thereof |
Mar. 10, 1981 |
| 4221690 |
Coating composition for acceptor sheets in carbonless copying |
Sep. 9, 1980 |
| 4220356 |
Recording materials containing chromenoindoles |
Sep. 2, 1980 |
| 4218504 |
Heat-sensitive recording paper |
Aug. 19, 1980 |
| 4109048 |
Recording material containing gamma-alumina |
Aug. 22, 1978 |
| 4055358 |
Nitro-phthalides, their manufacture and their use in recording systems |
Oct. 25, 1977 |
| 4053324 |
Production of reduced charge montmorillonite pigment |
Oct. 11, 1977 |
| 4052218 |
Novel spiro-heterocyclic compounds, their preparation, and use thereof in a thermographic recording material |
Oct. 4, 1977 |
| 4047738 |
Record sheets sensitized with reduced charge montmorillonite pigment |
Sep. 13, 1977 |
| 4042412 |
High solids content active clay coating formulations and methods for producing and applying the same |
Aug. 16, 1977 |
| 4040648 |
Record sheets sensitized with reduced charge montmorillonite pigment |
Aug. 9, 1977 |
| 4038097 |
Modified clay paper coating |
Jul. 26, 1977 |
| 4038101 |
Reactive pigments and methods of producing the same |
Jul. 26, 1977 |
| 4028133 |
Reduced charge montmorillonite pigment for sensitizing record material |
Jun. 7, 1977 |
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