Patents by Inventor Haldean C. Dalzell

Haldean C. Dalzell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 7-Carboethoxy-morphinan-6-one compounds
    Patent number: 4423221
    Abstract: The present invention involves 7-carboethoxymorphinan-6-one compounds of the formula: ##STR1## These compounds are useful as analgesic and/or narcotic antagonists.
    Type: Grant
    Filed: June 10, 1982
    Date of Patent: December 27, 1983
    Assignee: SISA Pharmaceutical Laboratories, Inc.
    Inventors: Raj K. Razdan, Haldean C. Dalzell
  • 4,5.alpha.-Epoxy-3-hydroxy or methoxy-7-(1-hydroxy-alkyl or 1-oxoalkyl)morphinan-6-one compounds
    Patent number: 4347361
    Abstract: Disclosed are 4,5.alpha.-epoxy-3-hydroxy or methoxy-7-(1-hydroxyalkyl or 1-oxoalkyl)morphinan-6-one compounds characterized by the structural formulae: ##STR1## In the foregoing formulae R is methyl, cyclopropylmethyl, cyclobutylmethyl, propargyl, allyl, dimethylallyl, cis-chloroallyl or furfuryl; R.sub.1 is H or methyl; R.sub.2 is straight or branched chain alkyl of from 1 to 10 carbon atoms, aryl, substituted aryl or arylalkyl, in which the alkyl group contains from 1 to 6 carbon atoms, and R.sub.3 is a straight chain alkyl of 1 to 4 carbon atoms.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: August 31, 1982
    Assignee: SISA, Incorporated
    Inventors: James E. Quick, Raj K. Razdan, Haldean C. Dalzell
  • Composition and method for treating glaucoma
    Patent number: 4126694
    Abstract: Tetrahydrodibenzopyrans having the structure ##STR1## in which R, R.sub.1, and R.sub.2 are alkyl having from 1 to 4 carbon atoms and ophthalmologically acceptable acid addition salts thereof are effective anti-glaucoma agents, free from all but a very small amount of CNS activity, when applied topically.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: November 21, 1978
    Assignee: SISA Incorporated
    Inventors: Raj K. Razdan, Haldean C. Dalzell, Harry G. Pars
  • Anti-glaucoma composition and method
    Patent number: 4126695
    Abstract: Tetrahydrodibenzopyrans having the structure ##STR1## in which R.sub.1 is hydrogen or acetyl and R.sub.2 is alkyl having from 1 to 4 carbon atoms are effective anti-glaucoma agents, free from all but a very small amount of CNS activity, when applied topically.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: November 21, 1978
    Assignee: SISA Incorporated
    Inventors: Raj K. Razdan, Haldean C. Dalzell, Barbara Z. Terris, Harry G. Pars