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Class Information
Number: 503/203
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 > Duplicating master
Description: Subject matter wherein the product is such that it can be used to produce further copies of the record by a "printing", that is, a nonphotos:graphic, technique.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7153628 |
Color-developing agent resin composition, emulsion thereof and method for preparing the same |
Dec. 26, 2006 |
| 7087276 |
Thermal transfer recording medium, thermal transfer recording method and recorded article |
Aug. 8, 2006 |
| 4474898 |
Pressure-sensitive copying paper of "transfer to plain paper" type |
Oct. 2, 1984 |
| 4372582 |
Stabilizer for electron doner-acceptor carbonless copying systems |
Feb. 8, 1983 |
| 4347283 |
Transfer-onto-plain paper type pressure-sensitive copying paper |
Aug. 31, 1982 |
| 4251092 |
Pressure sensitive carbonless duplicating systems and thermal marking systems |
Feb. 17, 1981 |
| 4244604 |
Image-offsetting |
Jan. 13, 1981 |
| 4189171 |
Marking systems containing 3-aryl-3-heterylphthalides and 3,3-bis(heteryl)phthalides |
Feb. 19, 1980 |
| 4142738 |
Base sheets for printing with reactive dyes |
Mar. 6, 1979 |
| 4096314 |
Pressure-sensitive transfer sheet |
Jun. 20, 1978 |
| 4087579 |
Pressure-sensitive transfer elements |
May. 2, 1978 |
| 4051283 |
Printed sheets containing concealed images and method and materials for preparation and visual development of same |
Sep. 27, 1977 |
| 4023830 |
Production of images |
May. 17, 1977 |
| 3979550 |
Pre-printed latent image spirit duplicating masters |
Sep. 7, 1976 |
| 3931443 |
Duplicating systems |
Jan. 6, 1976 |
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