Controlling engulfing and sequestering magnetic pads
Patent 6480321 Issued on November 12, 2002. Estimated Expiration Date: 
December 28, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 28, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPolychromal segmented balls for a twisting ball display Multithreshold addressing of a twisting ball display Subtractive color twisting ball display Process for creating an encapsulated electrophoretic display Tribo-addressed and tribo-suppressed electric paper Capsules for electrophoretic displays and methods for making the same Patent #: 6262833 InventorAssigneeApplicationNo. 749560 filed on 12/28/2000US Classes:359/296, Changing position or orientation of suspended particles345/84, Light-controlling display elements345/107Particle suspensions (e.g., electrophoretic)ExaminersPrimary: Epps, GeorgiaAssistant: Tra, Tuyen Attorney, Agent or FirmInternational ClassesG02B 026/00G09G 003/34 AbstractGyricon balls are provided with magnetic pads that allows them to be located into two different positions by means of a further stationary magnetic pad. The magnetic pads are engulfed and sequestered from sight so they do not decrement the brightness of the display. The magnetic pads are made by dispersing magnetic pigments into the polyethylene plastic. The addition of aluminum octoate to one hemisphere of the gyricon ball causes the pigmented plastic on that side of the ball to attempt to envelope the pigmented plastic on parts of the ball that does not have aluminum octoate added during the ball making process.Field of SearchChanging position or orientation of suspended particlesLight-controlling display elements Electroscopic (e.g., movable electrodes or electrostatic elements) Particle suspensions (e.g., electrophoretic) Including a second component containing structurally defined particles Polymeric or resinous material Solid-walled microcapsule from synthetic polymer Including synthetic resin or polymer Solid-walled microcapsule formed by in situ polymerization | |
