Patents by Inventor Ramesh C. Ahuja

Ramesh C. Ahuja 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).

  • Chemical sensors
    Patent number: 5294402
    Abstract: A chemical sensor consists of(a) a solid substrate,(b) a layer (D) which is applied to the substrate and contains one or more fluorescent compounds and(c) a layer (A) which is applied to the layer (D) and contains one or more coupling components (K) which, as a result of reacting with the analyte, give rise to one or more specific absorption bands, some or all of which overlap in the spectrum with the emission of the fluorescent compound of layer (D).
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: March 15, 1994
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Schrepp, Ramesh C. Ahuja, Wolfgang Budach, Dietmar Moebius
  • Photoconductive polyimide coating upon a substrate
    Patent number: 4363860
    Abstract: A photoconductive layer is produced upon a substrate by coating the substrate with a solution in an organic solvent of a polyamic acid and of 2,4,7-trinitro-9-fluorenone (TNF) and/or 2,4,5,7-tetranitro-9-fluorenone and heating the coated substrate at a temperature not exceeding 150.degree. C. to form on the substrate a polyimide coating containing the said fluorenone compound as a photosensitizer.
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: December 14, 1982
    Assignee: Nederlandsch Organisatie voor Toegepast-Natuurvetenschappelijk Onderzoek Ten Behoeve van Nyserheid, Handel en Verkeer
    Inventors: Jan van Turnhout, Ramesh C. Ahuja
  • Process for producing a photoconductive polyimide coating upon a substrate
    Patent number: 4355089
    Abstract: A photoconductive layer is produced upon a substrate by coating the substrate with a solution in an organic solvent of a polyamic acid and of 2,4,7-trinitro-9-fluorenone (TNF) and/or 2,3,4,7-tetranitro-9-fluorenone and heating the coated substrate at a temperature not exceeding 150.degree. C. to form on the substrate a polyimide coating containing the said fluorenone compound as a photosensitizer.
    Type: Grant
    Filed: August 8, 1978
    Date of Patent: October 19, 1982
    Assignee: Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Ten Behoeve Van Nijverheid, Handel En Verkeer
    Inventors: Jan van Turnhout, Ramesh C. Ahuja