Patents by Inventor Suresh Chandra

Suresh Chandra 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).

  • Patent number: 7335342
    Abstract: In the present invention a process for the preparation of sodium silicate from Kimberlite tailing generated as solid waste during diamond mining is disclosed. The process comprises, reacting Kimberlite tailing with mineral acid to remove acid soluble impurities followed by digesting acid treated Kimberlite tailing with alkali solution in a open or closed system to obtain sodium silicate useful for commercial applications.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: February 26, 2008
    Assignee: Council of Scientific and Industrial Research
    Inventors: Raksh Vir Jasra, Hari Chand Bajaj, Rajesh Shantilal Somani, Haresh Mahipatlal Mody, Jatin Rameshchandra Chunawala, Devendra Lalijibhai Ghelani, Hemal Narendrakumar Ranpara, Dipti Jivanbhai Barochiya, Suresh Chandra, Maharaj Kishan Dhar, C. Kesava Rao, Kamlesh Kumar
  • Publication number: 20070104634
    Abstract: In the present invention a process for the preparation of sodium silicate from Kimberlite tailing generated as solid waste during diamond mining is disclosed.
    Type: Application
    Filed: March 14, 2006
    Publication date: May 10, 2007
    Inventors: Raksh Jasra, Hari Bajaj, Rajesh Somani, Haresh Mody, Jatin Chunawala, Devendra Ghelani, Hemal Ranpara, Dipti Barochiya, Suresh Chandra, M. Dhar, C. Rao, Kamlesh Kumar
  • Publication number: 20060140853
    Abstract: The present invention provides a process for the preparation of detergent builder Zeolite-A from Kimberlite tailing generated as solid waste during diamond mining is disclosed. The process comprises, reacting an acid treated Kimberlite tailing with alkali solution to obtain sodium silicate and reacting it with alkaline aluminium source at room temperature and crystallizing at higher temperature to obtain Zeolite-A. The product is useful as builder in detergent formulation.
    Type: Application
    Filed: December 27, 2004
    Publication date: June 29, 2006
    Applicants: Council of Scientific and Industrial Research, National Mineral Development Corporation
    Inventors: Raksh Jasra, R. S. Somani, H. M. Mody, Hari Bajaj, J. Chunawala, Hemal Ranpara, Dipti Barochiya, Devendra Ghelani, Suresh Chandra, M. Dhar, Keshav Rao, Kamlesh Kumar
  • Patent number: 7037476
    Abstract: A new process is described for the preparation of free flowing hydrated amorphous silica from kimberlite tailing—a waste in diamond mining. The process comprises treating of kimberlite with acid, further reacting it with alkali solution to obtain soluble metal silicate solution, which is subsequently neutralized with mineral acid to polymerize silica as insoluble precipitates. The products is useful in rubber, paints as abrasive etc.
    Type: Grant
    Filed: December 27, 2004
    Date of Patent: May 2, 2006
    Assignees: Council of Scientific and Industrial Research, National Mineral Development Corporation Limited
    Inventors: Raksh Vir Jasra, Haresh Mahipatlal Mody, Hari Chand Bajaj, Rajesh Shantilal Somani, Jatin Rameshchandra Chunawala, Hemal Ranpara, Dipti Barochiya, Devendra Ghelani, Suresh Chandra, Maharaj Kishen Dhar, Keshav Rao, Kamlesh Kumar
  • Publication number: 20060032704
    Abstract: A ladder with a tip warning system. The ladder is configured to be carried by at least one human user, and includes a plurality of legs with rungs disposed between the legs, and a tip warning system. The tip warning system includes weight sensors, a controller cooperative with measurements taken by the weight sensors, and a warning alarm made up of one or both of audio and visual components. The alarm components may be either hardwire connected to the rest of the system or wirelessly using a transmitter and a receiver for conveying a signal corresponding to an operational status of the ladder. Imbalance conditions, such as due to the weight of a climber approaching beyond the footprint of the ladder, generate an imbalance signal that activates the tip warning system to provide notorious indicia of such condition to the user.
    Type: Application
    Filed: October 14, 2005
    Publication date: February 16, 2006
    Inventor: Suresh Chandra
  • Patent number: 6966403
    Abstract: A ladder with a tip warning system. The ladder is configured to be carried by at least one human user, and includes a plurality of legs with rungs disposed between the legs, and a tip warning system. The tip warning system includes an audio alarm and a visual alarm, a power source, one or more weight sensors and a controller signally coupled to the weight sensors. Imbalance conditions, such as due to the weight of a climber extending beyond the footprint of the ladder, generate an imbalance signal that activates the tip warning system to provide notorious indicia of such condition to the user. In one form, a counterweight activated by the imbalance signal may be incorporated to correct dangerous operating conditions.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: November 22, 2005
    Inventor: Suresh Chandra
  • Patent number: 6911958
    Abstract: The back-up structure of a parabolic dish antenna, which supports its reflecting surface, is formed in this invention by preloading its radial and circumferentially placed straight structural members and hence it is termed as preloaded parabolic dish antenna. Such a preloading results in considerable reduction in its weight and also to the effort involved in its assembly. The back-up structure of the preloaded parabolic dish antenna is made of a central hub, an assembly of a suitable number of elastically bent radial structural members connected rigidly to the central hub and to the same number of straight structural members which are connected to the tips of the radial members at the outer rim of the dish and also to straight bracing members placed circumferentially at intermediate locations, which are all tensioned to specified prestress values in the absence of wind loading. The outermost rim members placed at the periphery of the dish form the aperture of the dish.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: June 28, 2005
    Assignee: Tata Institute of Fundamental Research
    Inventors: Govind Swarup, Suresh Chandra Tapde
  • Patent number: 6787674
    Abstract: The present invention relates to anti-microbial activity of the essential oil of Cymbopogon flexuosus (Nees ex Steud) Wats and the process of isolation of novel sesquiterpene compound which is mainly responsible for the strong anti-microbial/anti-bacterial activity. The present invention particularly relates to anti-bacterial activity of the essential oil and a pure isolate identified as (+)-1-bisabolone of formula 1 against gram positive bacteria from a strain of a grass identified as Cymbopogon flexuosus.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: September 7, 2004
    Assignee: Council of Scientific and Industrial Research
    Inventors: Subhash Chandra Taneja, Ashok Kumar Shahi, Vijeshwar Verma, Vijay Kumar Sethi, Samar Singh Andotra, Abid Zaffar Hashmi, Prabhu Dutt, Sanotosh Kumar Bakshi, Maharaj Krishan Koul, Satya Narayan Sharma, Suresh Chandra, Ghulam Nabi Qazi
  • Publication number: 20040027309
    Abstract: The back-up structure of a parabolic dish antenna, which supports its reflecting surface, is formed in this invention by preloading its radial and circumferentially placed straight structural members and hence it is termed as preloaded parabolic dish antenna. Such a preloading results in considerable reduction in its weight and also to the effort involved in its assembly. The back-up structure of the preloaded parabolic dish antenna is made of a central hub, an assembly of a suitable number of elastically bent radial structural members connected rigidly to the central hub and to the same number of straight structural members which are connected to the tips of the radial members at the outer rim of the dish and also to straight bracing members placed circumferentially at intermediate locations, which are all tensioned to specified prestress values in the absence of wind loading. The outermost rim members placed at the periphery of the dish form the aperture of the dish.
    Type: Application
    Filed: January 24, 2003
    Publication date: February 12, 2004
    Inventors: Govind Swarup, Suresh Chandra Tapde
  • Publication number: 20030154532
    Abstract: A new and distinct plant strain of Cymbopogon designated as Cymbopogon RLJCC1 characterized by its higher yield of oil which is rich in geraniol and geranyl acetate, which is drought tolerant, having faster regeneration and vigorous growth.
    Type: Application
    Filed: February 8, 2002
    Publication date: August 14, 2003
    Inventors: Ashok Kumar Shahi, Satya Narayan Sharma, Swadesh Pal, Suresh Chandra, Prabhu Dutt, Surendra Singh Balyan, Maharaj Krishen Bhan, Subhash Chandra Taneja, Ravinder Kumar Raina, Vijeshwar Verma, Shazia Zahoor, Maharaj Krishen Kaul, Ghulam Nabi Qazi
  • Patent number: 6589015
    Abstract: A centrifugal compressor includes an impeller and a diffuser. The impeller has an inner integral hub with vanes thereon, is adapted to rotate within an outer shroud about a central longitudinal axis, and has a defined hub-to-shroud distribution of fluid exit angles. The diffuser, downstream from the impeller, comprises a plurality of circumferentially spaced discrete passages at least partially defining fluid paths through the diffuser, and angled such that adjacent discrete passages intersect each other to form an annular semi-vaneless diffuser inlet space. The discrete passages downstream of the semi-vaneless space each have an inlet therefrom and an outlet with a greater cross-sectional area than the inlet. The intersection of the annular semi-vaneless space and each discrete passage defines a leading edge thereof.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: July 8, 2003
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Douglas Allan Roberts, André Denis LeBlanc, Suresh Chandra Kacker, Peter Ralph Townsend, Ioan Sasu
  • Patent number: 6052218
    Abstract: A high brightness optical parametric amplifier array uses energy--scaleable optical parametric amplifiers that provide high brightness output. The leability in energy is achieved by using an array of parallel crystal amplifiers to handle high laser energies. High brightness is obtained by using an optical phase conjugator to keep the phase front of the array coherent.
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: April 18, 2000
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Suresh Chandra, Geraldine H. Daunt, Michael J. Ferry
  • Patent number: 5943358
    Abstract: An unstable laser resonator geometry with a gradient reflectivity mirror M) and external lens, or a gradient reflectivity mirror-lens (GRML), achieving a vast improvement in the intrinsic divergence and brightness of the output laser beam.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: August 24, 1999
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Toomas H. Allik, Suresh Chandra, J. Andrew Hutchinson
  • Patent number: 5805623
    Abstract: A solid-state dye laser and technique for achieving multiple output wavelength laser emission from a single solid-state dye laser media containing multiple dyes without tuning elements. When the multiple dyes within the single solid-state host are excited with a single wavelength pump source to lase, there results simultaneous multi-spectral output proportional to dye concentration ratios.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: September 8, 1998
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard Utano, Suresh Chandra, Toomas H. Allik, Timothy R. Robinson
  • Patent number: 5018163
    Abstract: A laser oscillator system which transmits laser input beam pulses through optical diode and into a plurality of time-multiplexed phase conjugate amplifier which sequentially amplify in chronological order subsequent input beam pulses. The optical diode is positioned on the oscillator laser beam pulse axis and is comprised of a polarizer, a half-wave plate which rotates the pulse polarity by 45.degree. in one direction and a Faraday rotator which rotates the pulse polarity 45.degree. in the opposite direction. A plurality of grouped Pockels cells and polarizers are positioned on the oscillator axis past the Faraday rotator. The polarizers route the input beam pulse toward a phase conjugate amplifier when a half-wave voltage is applied to the Pockels cell. Each phase conjugate amplifier has a phase conjugate mirror, at its output for retroreflecting the once amplified input laser beam pulse back therethrough for a second amplification.
    Type: Grant
    Filed: April 26, 1990
    Date of Patent: May 21, 1991
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Geraldine H. Daunt, Richard A. Utano, Suresh Chandra
  • Patent number: 4998259
    Abstract: A laser oscillator system which transmits laser input beam pulses through a olarizer onto the surface of a rotating mirror which routes the laser beam pulses sequentially into a plurality of stationary phase conjugate amplifiers. The pulse repetition frequency of the oscillator input beam pulses is much higher than any one of the amplifiers can handle without overheating. The amplifiers are positioned in a circle around the laser oscillator axis. The polarizer and rotating mirror are positioned on the oscillator axis. The mirror is synchronized with the input beam pulses so that each subsequent input beam pulse enters the next amplifier in sequence. Each phase conjugate amplifier has associated therewith a quarter-wave plate and a phase conjugate mirror at its output. The phase conjugate mirror is preferably comprised of a focusing lens and a stimulated Brillouin scattering cell.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: March 5, 1991
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Suresh Chandra, Geraldine H. Daunt
  • Patent number: 4989216
    Abstract: A double conjugate laser beam amplifier which twice conjugates the laser ut beam and provides an output beam in exactly the same direction and of the same polarization as the input beam while retaining the alignment stability of singly conjugated amplifiers even when the thin film polarizer between two conjugate amplifiers is not stable. A half-wave voltage at a Pockels cell positioned on the beam axis immediately prior to the polarizer controls whether the oscillator beam is transmitted through the polarizer or is reflected off the polarizer toward a first conjugate amplifier for amplification and retroflection back through the first conjugate amplifier and the polarizer into a second conjugate amplifier for further amplification and retroreflection back and is reflected off the polarizer a second time. The double conjugate amplifiers may be cascaded to both increase output and laser beam pulse repetition rate.
    Type: Grant
    Filed: April 18, 1990
    Date of Patent: January 29, 1991
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Suresh Chandra, Geraldine H. Daunt
  • Patent number: 4837769
    Abstract: A portable laser designator is provided having a highly efficient slab type SGG:Cr:Nd output laser with a phase conjugation mirror and compact folded optical system.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: June 6, 1989
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Suresh Chandra, Jeffrey L. Paul
  • Patent number: 4725787
    Abstract: A relatively low-power but high-quality laser oscillator is coupled to a high-power laser amplifier. The amplifier includes a rectangular slab of laser active material, and a phase-conjugate end mirror.
    Type: Grant
    Filed: December 31, 1986
    Date of Patent: February 16, 1988
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Suresh Chandra
  • Patent number: PP15595
    Abstract: A new and distinct variety of Cymbopogon commutatus grass is provided. The new variety was discovered during a mass selection program that was carried out in India in a cultivated area, and offers significant advantages over a typical plant of the species. More specifically, the new variety exhibits superior drought tolerance, a vigorous perennial growth habit, and lighter green leaves than typically exhibited by the species. The plant produces an essential oil having an enhanced geraniol and geranyl acetate content that is useful to form perfumes and in flavor applications. Asexual reproduction can be readily carried out by the rooting of slips.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: March 1, 2005
    Assignee: Council of Scientific and Industrial Research
    Inventors: Ashok Kumar Shahi, Satya Narayan Sharma, Swadesh Pal, Suresh Chandra, Prabhu Dutt, Surendra Singh Balyan, Maharaj Krishen Bhan, Subhash Chandra Taneja, Ravinder Kumar Raina, Vijeshwar Verma, Shazia Zahoor, Maharaj Krishen Kaul, Ghulam Nabi Qazi