Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Tablets – lozenges – or pills
Reexamination Certificate
2007-05-22
2007-05-22
Sheikh, Humera N (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Tablets, lozenges, or pills
C424S468000, C424S474000, C424S475000, C424S476000
Reexamination Certificate
active
10182239
ABSTRACT:
The present invention is to provide a sustained release preparation comprising a drug-containing core substance and a multilayered coating layer covering the core substance, wherein all adjacent layers in the multilayered coating layer contain mutually different hydrophobic organic compound-water-soluble polymer mixtures; and, a method of producing a sustained release preparation, having a multilayered coating layer in which adjacent layers contain different hydrophobic organic compound-water-soluble polymer mixtures, which comprises spray-coating a solution containing a hydrophobic organic compound-water-soluble polymer mixture onto a drug-containing core substance, continuing to spray-coat a solution containing a different hydrophobic organic compound-water-soluble polymer mixture onto the resulting coating layer, and repeating this step.
REFERENCES:
patent: 4359483 (1982-11-01), Kaetsu et al.
patent: 4863742 (1989-09-01), Panoz et al.
patent: 5296236 (1994-03-01), Santus et al.
patent: 5447729 (1995-09-01), Belenduik et al.
patent: 5527545 (1996-06-01), Santus et al.
patent: 5674533 (1997-10-01), Santus et al.
patent: 0 320 097 (1989-06-01), None
patent: 0 335 560 (1989-10-01), None
patent: 0 438 249 (1991-07-01), None
patent: 0 671 168 (1995-09-01), None
patent: 2 245 492 (1992-01-01), None
patent: 4-290817 (1992-10-01), None
patent: 92/20326 (1992-11-01), None
patent: 95/25506 (1995-09-01), None
Ikegami Kengo
Ishibashi Takashi
Mizobe Masakazu
Nagao Keigo
Yoshino Hiroyuki
Birch & Stewart Kolasch & Birch, LLP
Sheikh Humera N
Tanabe Seiyaku Co. Ltd.
LandOfFree
Sustained-release preparation and process for producing the... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sustained-release preparation and process for producing the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sustained-release preparation and process for producing the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3818657