Nova Patents
EP1237665A4

Piezoelectric-drop-on-demand technology

Abstract

A method and apparatus for cleaning the interior of capillary tubes (62) used to dispense 1 to 100 micron diameter liquid droplets by a piezoelectric transducer (60) surrounding each capillary tube. Magnetic particles are aspirated into the capillary tubes and moved by an exterior magnet to cause deposits on the interior walls to be dislodged and subsequently discharged from the capillary tube. In a preferred embodiment, the magnetic particles are coated with a material capable of binding such deposits.

Term

Term ended

Projected expiry passed 13 October 2020, 5.9 years ago.

  1. Priority
  2. Filed
  3. Published
  4. Projected expiry
  5. Today

Every citation, both waysCites: the store holds 2 of 3

Citations
DocumentRelationOfficeCategoryCited duringRelevant claims
EP0465749A1CitesEuropean Patent Office (EPO)ASearch report1
US3941700ACitesUnited States of AmericaASearch report1