Patents Assigned to HPD Laboratories, Inc.
  • Manual toilet bowl cleaner
    Patent number: 6255267
    Abstract: The present invention is an improved liquid toilet bowl cleanser comprising a fluorosurfactant coating agent, an anionic or non-ionic cleaner and a rheology control agent together with other minor excipients. The flurosurfactant continually adheres to and coats the porcelain surface of the toilet bowl during the active life of the cleanser composition preventing the formation of toilet bowl stains and mineral deposits for a substantial period of time after manual cleaning.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: July 3, 2001
    Assignee: HPD Laboratories, Inc.
    Inventors: Bala C. Nayar, Ronnie A. Carroll, Kenneth J. Ward
  • Multiple compacted solids and packages therefor
    Patent number: 6112898
    Abstract: A package for containing two automatic toilet bowl cleaners, one containing a bleaching cleaner and the other containing a detergent cleaner and a fragrance or dye susceptible to degradation by the bleaching agent, has separate pouches to separate the solids. The pouches open in concert to allow simultaneous dispensing of the solids. In operation, the water in the toilet cistern and bowl is cleaned both by the detergent and the bleaching agent, and the fragrance or dye is not affected by the bleaching agent.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: September 5, 2000
    Assignee: HPD Laboratories, Inc.
    Inventors: Nicholas D. Siragusa, Kenneth J. Ward, Deborah A. Sarasohn, Ernest Bernarducci, Arthur Sternheimer