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 |
| 7572115 | Corrosion-resistant rotor for a magnetic-drive centrifugal pump A rotor for a magnetic-drive centrifugal pump includes a core for supporting a magnetic assembly of magnets. An inner barrier covers at least part of the magnets. The inner barrier hermetically isolates the magnetic assembly within the impeller. For example, in one ... | 08/11/2009 |
| 6997688 | Secondary containment for a magnetic-drive centrifugal pump A centrifugal pump includes a housing having a housing cavity, an inlet, and an outlet. A pump shaft is located within the housing cavity. A radial bearing coaxially surrounds the pump shaft. The shaft and the radial bearing are rotatable with respect to one another... | 02/14/2006 |
| 6908291 | Corrosion-resistant impeller for a magnetic-drive centrifugal pump An impeller for a magnetic-drive centrifugal pump includes a core for supporting a magnetic assembly of magnets. An inner barrier covers at least part of the magnets. The inner barrier hermetically isolates the magnetic assembly within the impeller. For example, in ... | 06/21/2005 |
| 6293772 | Containment member for a magnetic-drive centrifugal pump A containment member for a magnetic-drive centrifugal pump includes a reinforcement member cooperating with an inner layer and an outer layer to form a unitary body. The inner layer has a first side defining a generally annular recess and a second side op... | 09/25/2001 |
