Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 6582764 | Hybrid inorganic/organic color effect materials and production thereof A color effect material is composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with a first layer which acts as a reflector to light directed thereon, a visibly transparent second organic layer encapsulating ... | 06/24/2003 |
| 6582507 | BiOCl pigment A bismuth oxychloride effect pigment has a zinc oxide or microfine titanium dioxide particulate at about the surface of the crystals of the bismuth oxychloride. The pigment is prepared by, for instance, growing the bismuth oxychloride crystals, and adding... | 06/24/2003 |
| 6533858 | Effect pigments with improved colorant adhesion Non-bleeding, non-agglomerated, lustrous colored combination pigments constitute a platy substrate and absorption colorant bound thereto with metal hydroxides and one or more hydrolyzed silane coupling agents.... | 03/18/2003 |
| 6524661 | Method of electrostatically coating a substrate A laminar pigment which has an aluminum- or an aluminum-cerium oxide coating combined with a hydrolyzed silane coupling agent treated surface is used as a pigment for a powder coating composition. By combining the pigment with a powdery film-forming polym... | 02/25/2003 |
| 6517939 | Noble metal coated substrate pigments A silver/gold coated laminar substrate pearlescent product is improved by incorporating rhodium in an amount of up to about 2% into the coating and/or by overcoating with a silane in an amount of up to about 5%.... | 02/11/2003 |
| 6485556 | Interference pigments Pearlescent pigment having a chromium coating thereon and an iron oxide coating on the chromium coating are intensely colored, almost phosphorescently colored, and are highly reflective.... | 11/26/2002 |
| 6475608 | Multi-layer iridescent films A transparent iridescent thermoplastic resinous laminate film having at least 10 very thin layers of substantially uniform thickness, said layers being generally parallel, the contiguous adjacent layers being of different transparent thermoplastic resinou... | 11/05/2002 |
| 6475273 | Color effect materials and production thereof A color effect material is composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with a first layer selected from the group consisting of silicon, aluminum, titanium nitride and mixtures thereof, which acts as ... | 11/05/2002 |
| 6440208 | Alloy color effect materials and production thereof A color effect material is composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with copper, zinc, an alloy of copper, or an alloy of zinc first layer which acts as a reflector to light directed thereon, a sec... | 08/27/2002 |
| 6361593 | Lustrous interference pigments with black absorption color A lustrous interference pigment with a black absorption color is obtained by forming a mica coated with hydrous titanium, iron and cobalt or chromium oxides, calcining the coated mica and then coating the resulting product with hydrous titanium and/or iro... | 03/26/2002 |
