Patents by Inventor Robert P. Grasso

Robert P. Grasso 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).

  • Organosilicon polymers, and dyes, exhibiting nonlinear optical response
    Patent number: 5605726
    Abstract: Organosilicon polymers, including crosslinked polymers and crosslinkable prepolymers, of cyclic polysiloxanes, organic dyes, and, optionally, polyenes. The dyes include those with delocalized Pi electron systems linking electron donor groups and electron acceptor groups, and with at least two carbon-carbon double bond-containing pendant groups attached to at least two different sites from among the indicated delocalized Pi electron systems, donor groups, and acceptor groups. Also disclosed are optical substrates coated with the organosilicon crosslinked polymers exhibiting second order non-linear optical susceptibility.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: February 25, 1997
    Assignee: Herecules Incorporated
    Inventors: Wayne M. Gibbons, Robert P. Grasso, Michael K. O'Brien, Paul J. Shannon, Shao-Tang Sun
  • Dichroic azo dyes
    Patent number: 5589100
    Abstract: Arylazo and poly(arylazo) dyes having at least one core radical selected from naphthyl or anthracyl and having at least one 2,3-dihydro-1,3-dialkyl perimidine substituent, a guest-host composition comprising a liquid crystal host solvent and the arylazo or poly(arylazo) dichroic dye, and a liquid crystal display comprising the guest-host composition, are disclosed.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: December 31, 1996
    Assignee: Hercules Incorporated
    Inventors: Robert P. Grasso, Michael K. O'Brien, Paul J. Shannon
  • Arylazo and poly(arylazo) dyes having at least one core radical selected from naphthyl or anthracyl and having at least one 2,3-dihydro-1,3-dialkyl perimidine substituent
    Patent number: 5326865
    Abstract: Arylazo and poly(arylazo) dyes having at least one core radical selected from naphthyl or anthracyl and having at least one 2,3-dihydro-1,3-dialkyl perimidine substituent, a guest-host composition comprising a liquid crystal host solvent and the arylazo or poly(arylazo) dichroic dye, and a liquid crystal display comprising the guest-host composition, are disclosed.
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: July 5, 1994
    Assignee: Hercules Incorporated
    Inventors: Robert P. Grasso, Michael K. O'Brien, Paul J. Shannon
  • Organosilicon polymers, and dyes, exhibiting nonlinear optical response
    Patent number: 5298588
    Abstract: Organosilicon polymers, including crosslinked polymers and crosslinkable prepolymers, of cyclic polysiloxanes, organic dyes, and, optionally, polyenes. The dyes include those with delocalized Pi electron systems linking electron donor groups and electron acceptor groups, and with at least two carbon-carbon double bond-containing pendant groups attached to at least two different sites from among the indicated delocalized Pi electron systems, donor groups, and acceptor groups.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: March 29, 1994
    Assignee: Hercules Incorporated
    Inventors: Wayne M. Gibbons, Robert P. Grasso, Michael K. O'Brien, Paul J. Shannon, Shao-Tang Sun
  • Organosilicon polymers, and dyes, exhibiting nonlinear optical response
    Patent number: 5254655
    Abstract: Organosilicon polymers, including crosslinked polymers and crosslinkable prepolymers, of cyclic polysiloxanes, organic dyes, and, optionally, polyenes. The dyes include those with delocalized Pi electron systems linking electron donor groups and electron acceptor groups, and with at least two carbon-carbon double bond-containing pendant groups attached to at least two different sites from among the indicated delocalized Pi electron systems, donor groups, and acceptor groups.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: October 19, 1993
    Assignee: Hercules Incorporated
    Inventors: Wayne M. Gibbons, Robert P. Grasso, Michael K. O'Brien, Paul J. Shannon, Shao-Tang Sun