Methods and systems for coating particles

• US 9,463,426 B2
• Filed: 06/24/2005
• Issued: 10/11/2016
• Est. Priority Date: 06/24/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Tan, Sharon Mi Lyn
• Primary Examiner(s): VETERE, ROBERT A
• Application Number:
  US11/165,949
• Publication Number:
  US 20060292300A1
• Time in Patent Office: 4,127 Days
• Field of Search: 427/212
• US Class Current: 1/1
• CPC Class Codes: A61K 9/0039 Devices retained in the uterus for a prolonged period, e.g. intrauterine devices for contraception
• CPC Class Codes: A61K 9/5036 Polysaccharides, e.g. gums, alginate; Cyclodextrin
• CPC Class Codes: A61K 9/5089 Processes
• CPC Class Codes: B01J 13/04 by physical processes, e.g. drying, spraying
• CPC Class Codes: B01J 2/003 followed by coating of the granules to prevent the granules sticking together B01J2/30
• CPC Class Codes: B01J 2/06 in a liquid medium

Abstract

Methods and systems for coating particles are disclosed.

Claims

1. A method, comprising:

injecting pulses of gas into a container, wherein the container contains a continuous stream of a coating material, thereby forming a discontinuous stream of the coating material within a container, the discontinuous stream comprising multiple discrete portions of the coating material;

introducing a particle having a diameter of 3,000 microns or less into the container after the coating material has been introduced into the container; and

disposing the particle in one of the discrete portions of the coating material within the container.

2. The method of claim 1, further comprising disposing one particle in each of the multiple discrete portions of the coating material.

3. The method of claim 1, further comprising the step of cross-linking a polymer within the particle;

and then introducing the particle into the container.