Patents by Inventor William P. Purcell

William P. Purcell 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).

  • Publication number: 20150005266
    Abstract: The invention provides a topical formulation adapted for treatment of a skin condition comprising (i) at least one retinoid; and (ii) salicylic acid or an ester, amide, salt, or solvate thereof. The invention also includes a kit for treatment of skin conditions comprising a retinoid and salicylic acid, as well as a method of treating skin conditions utilizing the inventive formulation and kit.
    Type: Application
    Filed: September 18, 2014
    Publication date: January 1, 2015
    Inventor: William P. Purcell
  • Patent number: 8912175
    Abstract: The invention provides a topical formulation adapted for treatment of a skin condition comprising (i) at least one retinoid; and (ii) salicylic acid or an ester, amide, salt, or solvate thereof. The invention also includes a kit for treatment of skin conditions comprising a retinoid and salicylic acid, as well as a method of treating skin conditions utilizing the inventive formulation and kit.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: December 16, 2014
    Assignee: Molecular Design International, Inc.
    Inventor: William P. Purcell
  • Patent number: 5837728
    Abstract: Esters and amides of 9-cis-retinoic acid are synthesized, formulated into pharmaceutically acceptable carriers and administered for the treatment of acne vulgaris, cystic acne, hyper-pigmentation, hypo-pigmentation, psoriasis, dermal and epidermal hypoplasia and kerotoses, the reduction of wrinkling of the skin as an incident of aging and actinic damage, normalization of the production of sebum, the reduction of enlarged pores, promoting the rate of wound healing, limiting of scar tissue formation during healing and the like. They are additionally useful for treatment or amelioration of the same additional classes of skin disorders as is retinoic acid itself and other retinoids. These disorders include ichthyoses (e.g., ichthyosis hystrix, epidermolytic hyperkeratosis, and lamellar ichthyosis), follicular disorders (e.g., pseudofolliculites, senile comedones, nevus comidonicas, and trichostatis spinulosa), benign epithelial tumors (e.g.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: November 17, 1998
    Assignee: Molecular Design International
    Inventor: William P. Purcell
  • Patent number: 5124356
    Abstract: The dermal use of non-irritating retinoids such as the esters and amides of 13-cis and 13-trans-retinoic acid for effecting the reduction and reversal of photoaging and skin cancer is disclosed.
    Type: Grant
    Filed: November 6, 1990
    Date of Patent: June 23, 1992
    Assignee: Molecular Design International, Inc.
    Inventors: William P. Purcell, Harlie A. Parish, Jr.
  • Patent number: 5049584
    Abstract: The dermal use of non-irritating retinoids such as the esters and amides of 13-cis and 13-trans-retinoic acid for effecting the reduction and reversal of photoaging and skin cancer is disclosed.
    Type: Grant
    Filed: November 6, 1990
    Date of Patent: September 17, 1991
    Assignee: Molecular Design International
    Inventors: William P. Purcell, Harlie A. Parish, Jr.
  • Patent number: 4994491
    Abstract: The dermal use of non-irritating retinoids such as the esters and amides of 13-cis and 13-trans-retinoic acid for effecting the reduction and reversal of photoaging and skin cancer is disclosed.
    Type: Grant
    Filed: December 14, 1988
    Date of Patent: February 19, 1991
    Assignee: Molecular Design International
    Inventors: William P. Purcell, Harlie A. Parish, Jr.
  • Patent number: 4885311
    Abstract: Esters and amides of 13-trans-retinoic acid are disclosed which are used for the treatment of acne and skin diseases.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: December 5, 1989
    Assignee: Molecular Design International
    Inventors: Harlie A. Parish, William P. Purcell
  • Patent number: 4677120
    Abstract: Esters and amides of 13-cis-retinoic acid are disclosed which are used for the treatment of acne and skin diseases.
    Type: Grant
    Filed: July 31, 1985
    Date of Patent: June 30, 1987
    Assignee: Molecular Design International
    Inventors: Harlie A. Parish, William P. Purcell
  • Patent number: 4361700
    Abstract: Derivatives of pyridopyrimidinone of the following formulae: ##STR1## wherein Y is C.dbd.S, C.dbd.O, SO.sub.2, or CH.sub.2 ;Z is C--H, N, S or O;R.sub.1 is hydrogen, hydroxyl, halogen, lower alkyl or R.sub.3 ;R.sub.2 is hydrogen, aliphatic hydrocarbon, substituted aliphatic hydrocarbon or carbocyclic aryl-aliphatic hydrocarbon, wherein the substituent of the aliphatic hydrocarbon may be hydroxyl, halogen, alkoxy, carboxylic acid ester, or lower alkyl amine;R.sub.3 is ##STR2## wherein A is carbon, nitrogen, oxygen, or sulfur; R.sub.
    Type: Grant
    Filed: May 20, 1980
    Date of Patent: November 30, 1982
    Assignee: James S. Waldron
    Inventors: William P. Purcell, Richard D. Gilliom, Harlie A. Parish, Jr.
  • Patent number: 4312862
    Abstract: Novel therapeutically active derivatives of benzamide, having the general formula ##STR1## in which R.sub.1 and R.sub.2, independently of each other, are hydrogen or a lower alkyl group, R.sub.3 is a phenyl or lower alkyl or lower alkenyl group, R.sub.4 is a halogen or a trifluoromethyl or nitro-group, R.sub.5 is a sulphamoyl or carboxyl or carboxy-alkyl group, and the potassium salts of these derivatives.These compounds are diuretics and hypotensors (blood pressure depressants) and they lower the angiotensin and renin functions, with prolonged action.
    Type: Grant
    Filed: July 19, 1979
    Date of Patent: January 26, 1982
    Assignee: Debiopharm SA
    Inventors: William P. Purcell, Harlie A. Parish, Jr.
  • Patent number: RE34075
    Abstract: The dermal use of non-irritating retinoids such as the esters and amides of 13-cis and 13-trans-retinoic acid for effecting the reduction and reversal of photoaging and skin cancer is disclosed.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: September 22, 1992
    Assignee: Molecular Design International, Inc.
    Inventors: William P. Purcell, Harlie A. Parish