Polyamide porous spherical particle

Details Polyamide porous spherical particle Polyamide porous spherical particle

2011-05-17

2011-05-17

Yu, Gina C (Department: 1617)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Particulate form

C424S401000, C525S432000

Reexamination Certificate

active

07943177

ABSTRACT:
Polyamide porous spherical particles having a number-average particle diameter of 2 to 30 μm, a BET specific surface area of 100 to 80,000 m2/kg, and a ratio of a volume-average particle diameter to the number-average particle diameter in the range of 1.52 to 2.50 is reduced in luminous reflectance.

REFERENCES:
patent: 2006/0127424 (2006-06-01), Asano et al.
patent: 2002 080629 (2002-03-01), None
patent: 2005 120203 (2005-05-01), None
patent: 2005 239575 (2005-09-01), None
patent: WO 2004/043411 (2004-03-01), None
International Search Report Application No. PCT/JP2006/318997 mailed on Nov. 21, 2006.
English Translation of International Preliminary Report on Patentability—Application No. PCT/JP2006/318997 dated Apr. 1, 2008.
English Translation of Written Opinion of the International Searching Authority—Application No. PCT/JP2006/318997 dated Apr. 1, 2008.

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