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 |
| 6172275 | Method and apparatus for pyrolytically decomposing waste plastic Disclosed is a method and apparatus for pyrolytically decomposing waste plastic which may contain halogen-containing polymer such as PVC. The plastic is heated at 270° to 350° C., whereby a plasticizer contained in the plastic material is decomposed and... | 01/09/2001 |
| 5427843 | Ceramic-coated metal sheet A ceramic single layer-coated metal sheet having an excellent decorative property and a high weatherability, which comprises a metal substrate and a transparent ceramic layer formed on the metal substrate by a dry process such as physical vapor deposition... | 06/27/1995 |
