Patents by Inventor David D. Saperstein

David D. Saperstein 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: 5030478
    Abstract: Thin film recording media are protected and lubricated by overcoating them with a carbon overcoat applying a lubricant to said overcoat and bonding the lubricant to the carbon overcoat by irradiating it by UV radiation.
    Type: Grant
    Filed: February 15, 1991
    Date of Patent: July 9, 1991
    Assignee: International Business Machines Corporation
    Inventors: Li-Ju J. Lin, David D. Saperstein
  • Patent number: 4960609
    Abstract: In the manufacture of a thin film metal alloy or metal oxide magnetic recording disk, a fluoroether lubricant is bonded to the carbon or hydrogenated carbon overcoat of the disk. The lubricant is applied to the carbon overcoat by dipping the disk in a solution of the lubricant. The lubricated disk is then exposed to the plasma of an inert gas, such as nitrogen. The resulting disk contains a layer of lubricant which is bonded to the disk surface so as to be resistant to spin-off and which has a relatively uniform thickness so as to substantially eliminate the problems of stiction during the operation of the disk file.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: October 2, 1990
    Assignee: International Business Machines Corporation
    Inventors: Andrew M. Homola, Li-Ju J. Lin, David D. Saperstein
  • Patent number: 4511986
    Abstract: A method and apparatus for simultaneously recording multiple Fourier Transform Infrared (FT-IR) signals using an interferometer. The analog signals are coupled to switching means which is operable in response to a first control signal for synchronizing the operation of the interferometer and the control circuits and a second control signal for defining data acquisition intervals to direct the sampled data of the analog input signals over a circuit path including Sample and Hold and Analog to Digital Conversion circuits to a processor for storing the digital data corresponding to the analog input signals. The switching means is operated so that samples of the analog input signals are taken in sequence and stored in sequential storage locations in interleaved fashion. The processor is operable under program control to access the digital data so that all data samples for the same input signals are separated to produce an interferogram for each of the input signals.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: April 16, 1985
    Assignee: International Business Machines
    Inventors: Robert J. Bellar, William G. Golden, David D. Saperstein, Ashok Vats
  • Patent number: 4230883
    Abstract: The invention relates to the hydrohalide salts of L-.alpha. -methyl-3,4-dihydroxyphenylalanine (methydopa). The method of preparing these and related compounds in the absence of water or other polar solvents is also shown.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: October 28, 1980
    Assignee: Merck & Co., Inc.
    Inventors: David D. Saperstein, Seemon H. Pines
  • Patent number: 4182926
    Abstract: Methanol is vaporized at a temperature of from about 200.degree. C.-455.degree. C. and passed over a cobalt molybdate catalyst or a doped cobalt molybdate catalyst at a flow rate of from 60-200 cc./minute. The effluent gas comprises essentially methane and hydrogen in addition to some water vapors and CO.sub.2.
    Type: Grant
    Filed: September 21, 1978
    Date of Patent: January 8, 1980
    Assignee: Merck & Co., Inc.
    Inventor: David D. Saperstein
  • Patent number: 4134965
    Abstract: A novel improved molecular sieve is prepared by a caustic wash process. The sieves so prepared show improved properties in reactions involving e.g., superior acid scavenging ability.
    Type: Grant
    Filed: August 31, 1977
    Date of Patent: January 16, 1979
    Assignee: Merck & Co., Inc.
    Inventors: Alan J. Rein, David D. Saperstein, Seemon H. Pines