Process for conditioning substances

Patent 5709884 Issued on January 20, 1998. Estimated Expiration Date:

January 30, 2015. 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.

Abstract Claims Description Full Text

Patent References

Compositions and process of treatment
Patent #: 3987192
Issued on: 10/19/1976
Inventor: Wright

Composition for treating asthma
Patent #: 4405598
Issued on: 09/20/1983
Inventor: Brown

3-(1H-Tetrazol-5-yl)-4H-pyrimido[2,1-b]benzoxazol-4-one compounds exhibiting anti-allergic activity
Patent #: 4476130
Issued on: 10/09/1984
Inventor: Wade

Aerosol carriers Patent #: 5376386
Issued on: 12/27/1994
Inventor: Ganderton, et al.

Inventors

Assignee

Astra Aktiebolag

Application

No. 379471 filed on 01/30/1995

US Classes:

424/489, Particulate form (e.g., powders, granules, beads, microcapsules, and pellets)424/499Contains proteins or derivative or polysaccharides or derivative

Examiners

Primary: Criares, Theodore J.

Attorney, Agent or Firm

White & Case

Foreign Patent References

0436110 EP. 07/12/1991
8607547 WO. 12/12/1986

International Classes

A61K 009/14
A61K 009/50

Foreign Application Priority Data

1993-08-27 SE

Abstract

The present invention relates to a process for providing a stable crystallinic form to a fine-grained substance or a substance mixture, which can be produced, stored and used while maintaining the aerodynamic properties required for inhalation of such a substance or a substance mixture, bya) in case of a substance mixture, preparing a homogenous mixture of the substances;b) micronizing, direct precipitating or diminishing by any conventional method the substance or substance mixture into a particle size required for inhalation, the particle size being less than 10 μm;c) optionally preparing a homogenous mixture of the desired substances when each substance has been introduced from stage b) as separate fine-grained particles;d) conditioning said substance or substance mixture by treatment with a water containing vapor phase in a controlled fashion; ande) drying.

Other References

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