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US3782993A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for the preparation of small medicament particles

Assignee: ROHM GmbH DT
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Filing: 1971-11-19
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Granted: 1974-01-01
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Expires: 1991-11-19
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Abstract

Abstract A METHOD FOR FORMING MEDICATED PARTICLES BY ALTERNATELY APPLYING PORTIONS OF A LIQUID AND OF A SOLID POWDERED MEDICAMENT, INSOLUBLE IN SAID LIQUID, TO AN AGITATED SEED MATERIAL, AND DRYING SAID PARTICLES ONLY AFTER ALL SAID PORTIONS HAVE BEEN APPLIED. IF REQUIRED, A LIQUIDSOLUBLE BINDER FOR SAID MEDICAMENT MAY BE PRESENT, EITHER DISSOLVED IN THE LIQUID OR ADMIXED AS A POWDER WITH THE MEDICAMENT. EACH PORTION OF LIQUID IS WITHIN THE "CRITICAL LIQUID UPTAKE" REGION OF THE POWDER PORTION NEXT APPLIED, SAID REGION BEING EMPIRICALLY DETERMINED FOR EACH SYSTEM OF LIQUID AND MEDICAMENT (AND, IF NECESSARY, BINDER). SAID REGION ENCOMPASSES THOSE MIXTURES OF LIQUID AND SOLID SYSTEM COMPONENTS WHICH HAVE A CONSISTENCY BETWEEN STICKINESS, ON THE ONE HAND, AND A TENDENCY TO CRUMBLE, ON THE OTHER.

Inventors

  • 👤 G Rothgang
  • 👤 G Simon

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 22:34
CPC Classifications
A; A61; A61J; A61J3/00; A61J3/06; A61K; A61K9/00; A61K9/14; A61K9/16; A61K9/167; A61K9/1676

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) 1976-12-31 1977-07-02 1978-01-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-12-31 1981-07-02 1982-01-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-12-31 1985-07-02 1986-01-01 $7700.00 Window Closed / Lapsed

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