Patents by Inventor N. Balasubramanian

N. Balasubramanian 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: 10214621
    Abstract: A binary process for manufacturing dipped latex product. The binary process disclosed herein eliminates the influence of any level of pre-vulcanization on the outcome of the dipping process whether using natural or synthetic latex. The binary process includes preparing a first latex mixture Formulation A including latex, one or more accelerators, and one or more surfactants, but without curing agents; and preparing a second latex mixture Formulation B including latex, one or more curing agents, and one or more surfactants, but without curing accelerators. The process further includes dipping one or more formers into the Formulations A and B separately in order to form a plurality of coatings/layers of the Formulations A and B, and later on curing the plurality of coatings/layers on the formers to form the dipped latex products, which can be a condom, glove, balloon, catheter, finger cot, surgical tubing, baby bottle nipple or dental dam.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: February 26, 2019
    Assignee: TTK Healthcare Limited
    Inventors: William D. Potter, N. Balasubramanian, Srinivasan Jagannathan
  • Publication number: 20170081484
    Abstract: The present disclosure provides for a process for manufacturing of dipped latex products without using any animal derived ingredients and dipped latex products produced by said process. The disclosed process successfully over comes drawbacks of drop in product yield (due to coagulum formation) and burst pressures caused by absence-of casein in latex formulation. Therefore, the dipped latex products so produced through the process have final composition similar to that of any other dipped latex products with casein except for absence of casein and having 0.8 phr of Sulphur as against 0.6 phr of Sulphur in routine manufacturing. The products also exhibit physical properties similar to that of any other dipped latex products with casein, such as burst pressure and burst volume.
    Type: Application
    Filed: June 15, 2015
    Publication date: March 23, 2017
    Inventors: Srinivasan Jagannathan, N. Balasubramanian
  • Publication number: 20160145401
    Abstract: A binary process for manufacturing dipped latex product. The binary process disclosed herein eliminates the influence of any level of pre-vulcanization on the outcome of the dipping process whether using natural or synthetic latex. The binary process includes preparing a first latex mixture Formulation A including latex, one or accelerators, and one or more surfactants, and preparing a second latex mixture Formulation B including latex, one or more curing agents, and one or more surfactants. Further, dipping one or more formers into the Formulation A and B separately in order to form a plurality of coatings/layers of the Formulation A and B, and later on curing the plurality of coatings/layers on the formers to form the dipped latex products, which can be a condom, glove, balloon, catheter, finger cot, surgical tubing, baby bottle nipple or dental dam.
    Type: Application
    Filed: January 17, 2014
    Publication date: May 26, 2016
    Applicant: TKK Protective Devices Limited
    Inventors: William D. POTTER, N. BALASUBRAMANIAN, Srinivasan JAGANNATHAN
  • Patent number: 4636069
    Abstract: A method for reading deformation images recorded on electrophotographic media involving scanning of an image surface and measuring microscopic surface tilt in a reflected beam. In one embodiment, the deformation image is scanned telecentrically and in another embodiment the surface is scanned with a beam at angles to the surface. By intercepting the retroflected beam and measuring the deviation of the reflected beam from the scanning center, a number of proportional-to-surface tilt is found. By then electrically integrating over neighboring regions, an electrical or optical pattern, reimaging the deformation image, may be constructed.
    Type: Grant
    Filed: November 15, 1984
    Date of Patent: January 13, 1987
    Assignee: Matrix Instruments Inc.
    Inventor: N. Balasubramanian
  • Patent number: 4608578
    Abstract: A servo system for a braked accelerative transport in which a signal representing velocity of a carriage within the transport is compared to a first reference signal representing desired carriage velocity. The comparison yields an error signal which is used to adjust the brake of the transport. A hydraulic valve having an adjustable needle is used as the brake. A second selectable reference signal is provided so that the first reference signal can be bypassed when the carriage is reset at high velocity or is at reset. The valve is also bypassed on reset so that the adjusted brake mechanism is left intact on reset.
    Type: Grant
    Filed: October 29, 1984
    Date of Patent: August 26, 1986
    Assignee: Matrix Instruments Inc.
    Inventors: N. Balasubramanian, Alan L. Helgesson
  • Patent number: 4398787
    Abstract: An optical leverage telecentric scanning apparatus for scanning a large fat film transparency at a given location is disclosed, wherein the scan pattern from the transparency is detected for optical power spectrum analysis. The scanning apparatus includes a collimated laser beam supply and a refraction device for laterally translating the collimated beam across the transparency. To magnify the collimated beam, an optical leverage device is provided including a first lens arranged between the laser beam supply device and the refraction device, and a scanning concave parabolic mirror arranged between the diffraction device and the transparency. The degree of magnification afforded by the optical leverage device is equal to the ratio of the focal lengths of the mirror to the first lens, respectively. A detector arranged on the opposite side of the transparency from the refraction device detects the scan pattern produced by the laser beam passing through the transparency.
    Type: Grant
    Filed: June 17, 1981
    Date of Patent: August 16, 1983
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: N. Balasubramanian
  • Patent number: 4387994
    Abstract: An interferometric system for characterizing the surface of a test object, such as an aspheric surface. A white light interferogram is produced wherein the principal fringe indicates zero optical path difference between a test surface and a reference surface. Wavefronts from either of the test or reference surfaces are translated by incremental amounts. A multi-point detector array is used to make multi-point contrast readings. Points of contrast maxima for each detector point are computed by a statistical determination. A centroid function is preferred.By recording the points of maximum contrast and the incremental wavefront translation, two dimensional plots showing zero optical path differences for the two surfaces are obtained, thereby comparing the test and reference surfaces.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: June 14, 1983
    Inventor: N. Balasubramanian
  • Patent number: 4355904
    Abstract: A scanning laser measurement system for measuring depthwise variations of surfaces relative to a focal plane of an optical system. Laser light is directed to a test surface, generally aligned with the focal plane, through focusing optics having an optical axis. Some of the light from a beam spot is retro scattered from the test surface and reimaged along a path generally parallel to the optical axis. Depthwise variations in the test surface with respect to the focal plane cause spatial displacements in the retrobeam relative to the optical axis. The retrobeam is directed to a filter which is partially reflective and partially transmissive. A pair of photodetectors is used to intercept reflected and transmitted components of the retrobeam and the intensity of these components is measured and used to compute centroid values for the retrobeam on the filter for various beam spots on the test surface. The computed centroid values are directly proportional to depthwise surface deviations from the focal plane.
    Type: Grant
    Filed: April 14, 1980
    Date of Patent: October 26, 1982
    Inventor: N. Balasubramanian
  • Patent number: 4340306
    Abstract: An interferometric system for characterizing the surface of a test object, such as an aspheric surface. A white light interferogram is produced wherein the principal fringe indicates zero optical path difference between a test surface and a reference surface. Wavefronts from either of the test or reference surfaces are translated by incremental amounts and after each translation the position of the principal fringe is noted by observing the loci of points of maximum contrast. By recording the points of maximum contrast and the incremental wavefront translation, two dimensional plots showing zero optical path differences for the two surfaces are obtained, thereby comparing the test and reference surfaces.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: July 20, 1982
    Inventor: N. Balasubramanian
  • Patent number: 4272151
    Abstract: An apparatus is described which provides optical scanning with both high resolution and high speed. A low resolution acousto-optic deflector is scan-center coupled with a rotating scanner to allow high scanning speed without degrading the resolution characteristics associated with a rotating scanner. A mirror having a parabolic reflective surface exhibiting spherical aberration cooperates with a rotating multi-faceted cylindrical mirror to maintain the imaging focal point of the beam provided by the apparatus in a flat image field as the beam is caused to scan the field.
    Type: Grant
    Filed: October 30, 1979
    Date of Patent: June 9, 1981
    Inventor: N. Balasubramanian
  • Patent number: 4225240
    Abstract: A method and system for determining interferometric optical path length difference including: varying the interferometric optical path length difference between a first and a second surface in three steps at one-quarter wavelength intervals; sensing the intensity of the interferogram radiation at at least one position of the interferogram at each of the steps; storing the intensity sensed at each position at each step; for each of the positions adding the intensity of the first and third steps to produce a d.c. spatial frequency amplitude, subtracting the intensity of the third step from that of the first to obtain the cosinusoidal spatial frequency amplitude, and subtracting the intensity of the second step from the d.c.
    Type: Grant
    Filed: June 5, 1978
    Date of Patent: September 30, 1980
    Inventor: N. Balasubramanian
  • Patent number: 4225224
    Abstract: A laser projection and printing system wherein a laser beam is focused on e scan center of an X-Y galvo-deflector, passes through a condensing lens to a transparency to be projected, and is transmitted to an imaging lens for projection to a large format plate. The scanning galvinometer, condenser, and imaging lens render the laser beam effective to project the small transparency to a large format plate.
    Type: Grant
    Filed: March 13, 1979
    Date of Patent: September 30, 1980
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: N. Balasubramanian
  • Patent number: 4212073
    Abstract: A method and system for surface contouring including: projecting a sinusoidal pattern on a surface to be tested; shifting the pattern in three steps at one-quarter period intervals of the sinusoidal pattern; sensing the intensity of the radiation from the test surface through a mask containing the same sinusoidal pattern at at least one position of the surface at each of the steps; storing the intensity sensed at each position at each step; for each of the positions adding the intensity of the first and third steps to produce a d.c. spatial frequency amplitude, subtracting the intensity of the third step from that of the first to obtain the cosinusoidal spatial frequency amplitude, and subtracting the intensity of the second step from the d.c.
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: July 8, 1980
    Inventor: N. Balasubramanian
  • Patent number: 4204772
    Abstract: A non-contacting optical probe incorporates an optical system designed to measure distances between various surfaces which may be internal or external such as exists in molds and the like. A collimated light beam is passed off-center through a first lens and focused to a first point on a first surface coplanar with the focal plane of the lens. When the distance between the first surface and the optical probe carrying the collimated beam changes so that a second surface is presented, this second surface is no longer in the focal plane with the result that a laterally displaced image of the point of interception of the collimated beam with the point of the intersection of the optical axis of the system occurs. This lateral displacement is imaged back through the optical system to a sensing surface.
    Type: Grant
    Filed: September 25, 1078
    Date of Patent: May 27, 1980
    Assignee: Recognition Systems, Inc.
    Inventor: N. Balasubramanian
  • Patent number: 4158503
    Abstract: A heterodyne optical correlator allows a correlation function to be computed for plural portions of a stereo pair of transparencies which is normalized to thus reduce the possibility of false correlation peaks. To obtain the correlation function, a pair of stereo transparencies are illuminated by an intense monochromatic light source producing an image at a common image plane in which a detector array is located. The relative path length, between source and transparencies, is periodically modulated producing at plural locations of the detector array plural alternating current signals representing the correlation between the amplitude transmittances at various corresponding locations on the transparencies for a given relative displacement between the transparencies. To normalize this correlation coefficient a second signal is produced by illuminating only one transparency and a corresponding third signal is produced by illuminating only the other transparency.
    Type: Grant
    Filed: September 30, 1977
    Date of Patent: June 19, 1979
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: N. Balasubramanian