The Lactone Ring Shares The 11,12,13-positions Of The Cyclopentanohydrophenanthrene Ring System (e.g., 11, 18-lactones, Etc.) Patents (Class 540/74)
  • Photographically useful compounds including at least one 1,3-sulfur-oxygen ring system
    Patent number: 5674986
    Abstract: There are described heat-developable photosensitive image-recording materials which include a compound having at least one cyclic 1,3-sulfur-oxygen moiety. The compound is stable in the photographic processing composition but capable of undergoing cleavage in the presence of an imagewise distribution of silver ions and/or soluble silver complex made available as a function of development to liberate a reagent in an imagewise distribution corresponding to that of the silver ion and/or the soluble silver complex. The reagent includes a photographically useful group such as a complete dye or dye intermediate.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: October 7, 1997
    Assignee: Polaroid Corporation
    Inventors: Peter Viski, David P. Waller
  • 19-hydroxyaldosterone and its preparation
    Patent number: 4659704
    Abstract: There is provided the novel compound 19-hydroxyaldosterone. There is provided a process for its preparation. There are further provided pharmaceutical compositions comprising this compound as active ingredient. These are useful, amongst others, as mineralocorticoid drugs and as drug against Addison's disease.
    Type: Grant
    Filed: May 21, 1985
    Date of Patent: April 21, 1987
    Assignee: Ramot University Authority for Applied Research & Industrial Development Ltd.
    Inventors: Marcel Harnik, Yoel Kashman