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US3584113A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for the production of medical preparations having sustained release of therapeutical effect

Assignee: Eisai Co Ltd
•
Filing: 1968-08-19
•
Granted: 1971-06-08
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Expires: 1988-08-19
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Abstract

Abstract A NOVEL PROCESS FOR THE PRODUCTION OF MEDICAL PREPARATIONS HAVING SUBSTAINED RELEASE OF THE THEREAPEUTICAL ACTIVITY INTO DIGESTIVE ORGANS WHICH PROCESS ESSENTIALLY COMPRISES ATOMIZING AN QUEOUS MIXTURE CONTAINING A MEDICAL SUBSTANCE SOLUBLE IN WATER AND A WATER-MISSIBLE SUBSTANCE CAPABLE OF CONVERTING INTO A WATER-INSOLUBLE SUBSTANCE WHEN HE AQUEOUS MIXTYURE IS BROUGHT INTO AN ANHYDROUS CONDITION BY ATOMIZING. THE INVENTION IS ALSO CONCERNED WITH A PROCESS FOR PROVIDING THE MEDICAL PREPARATIONS HAVING ANTI-ULCER EFFECT BY BLENDING THE POWDERY, FINE PARTICLES CONTAINING AN ANTI-CHLORINE SUBSTANCE AND THE POWDERY, FINE PARTICLES OF AN ANTACID, THE BOTH PARTICLES HAVING ALMOST SAME SIZES RANGING APPROXIMATELY FROM 10 MICRONS TO 1000 MICRONS.

Inventors

  • 👤 Toshio Takebe
  • 👤 Shimesu Motoyama
  • 👤 Ryoichi Machida

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 14:52
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/14; A61K9/16; A61K9/1605; A61K9/1629; A61K9/1641; A61K9/1635

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-06-07 1974-12-07 1975-06-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-06-07 1978-12-07 1979-06-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-06-07 1982-12-07 1983-06-08 $7700.00 Window Closed / Lapsed

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