Patent · US Expired

Apparatus for the preparation of melt-sprayed spherical phenacetin granules

US4092089A · kind A · utility

15Cited by

5References

5Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Ernst Bocker
Wolfgang Kracht
Roland Rupp · Bensberg, DE
Erhard Schellmann · Cologne, DE
Viktor Trescher · Leverkusen, DE
Martin Ullrich · Leverkusen, DE

Key dates

Filing date	May 19, 1977
Grant date	May 30, 1978
Priority date	—
Expiry date	May 19, 1997

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S425/23
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

An apparatus for melt-spraying thermally sensitive material of low viscosity comprises a heatable multi-screw extruder having intermeshing, self-cleaning screws of specified clearance between the screws and between the screws and the extruder housing, a heatable pump for delivering molten material from the extruder to a heatable atomizer and a spray tank in which the atomizer is located for cooling and solidifying the melt-sprayed material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.