U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Controlled release liquid active agent formulation dosage forms

Patent 6342249 Issued on January 29, 2002. Estimated Expiration Date: Icon_subject December 22, 2019. 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.

Patent References

2707154

2799241

2805977

3133132

3173876

3276586

3541005

3541006

3546142

3573936

More ...

Inventors

Application

No. 470088 filed on 12/22/1999

US Classes:

424/473, With porous, perforated, apertured, or sieved layer (e.g., dialyzing layer, microporous layer, etc.)424/468, Sustained or differential release type424/472Layered unitary dosage forms

Examiners

Primary: Spear, James M.

Attorney, Agent or Firm

Foreign Patent References

  • 0 163 178 EP. 05/13/1985
  • 0 448 091 EP. 09/13/1991
  • 0 985 411 EP. 03/13/2012
  • 2 155 889 GB. 10/13/1985
  • WO 98/38987 WO. 09/13/1998

International Classes

A61K 009/22
A61K 009/24

Abstract

Controlled release of liquid, active agent formulations is provided by dispersing porous particles containing the liquid active agent formulation in osmotic, push-layer dosage forms. The dosage forms may provide for continuous or pulsatile delivery of active agents.

Other References

  • Berge, et al; Pharmaceutical Salts; Journal of Pharmaceutical Sciences; vol. 66, No. 1; pp. 1-19 (Jan. 1977)
  • Considine, P.E, Douglas M.; Van Nostrand Reinhold Encyclopedia of Chemistry 4th Edition; pp. 644-645 (1986)
  • Hixon, et al; Sizing Materials by Crushing and Grinding; Chemical Engineering; pp. 94-103 (Nov. 1990)
  • Parrott, Eugene L.; Milling of Pharmaceutical Solids; Journal of Pharmaceutical Sciences; vol. 63, No. 6; pp. 813-829 (Jun. 1974)
  • Perry; Screening; Chemical Engineering Handbook 6th Edition; pp. 21-13 to 21-19; (1984)
  • Ripple, Edward G. Ph.D.; Powders; Pharmaceutical Sciences Remington 17th Edition; pp. 1585-1594 (1985)
  • Rouse, B.P. Jr.; Cellulose Esters, Organic; Encyclopedia of Polymer Science & Technology vol. 3, pp. 325-354 (1964)
  • Sheth, et al; Use of Powdered Solution to Improve the Disolution Rate of Poluthiazide Tablets; Drug Development and Industrial Pharmacy; 16(5); pp. 769-777 (1990)
  • Wurster, Dale E.; Air-Suspension Technique of Coating Drug Particles A Preliminary Report; Journal of Americal Pharmacuetical Association Scientific Edition; vol. 48; pp. 451-459 (Aug. 1959)
  • Wurster, Dale E.; Preparation of Compressed Tablet Granulations by the Air-Suspension Technique II; Journal of Americal Pharmacuetical Association Scientific Edition; vol. 49, No. 2; pp. 82-84 (Feb. 1960)
  • Pharmaceutical Sciences by Remington 17th Edition, PP 403-405, (1985
PatentsPlus Images
Enhanced PDF formats
loading...
PatentsPlus: add to cart
PatentsPlus: add to cartSearch-enhanced full patent PDF image
$9.95more info
PatentsPlus: add to cart
PatentsPlus: add to cartIntelligent turbocharged patent PDFs with marked up images
$16.95more info
 
Sign InRegister
Username  
Password   
forgot password?