Patents Represented by Attorney M. F. Zuckerman

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  • Narrow size distribution zinc oxide
    Patent number: 4808398
    Abstract: Prepare highly pure zinc oxide spherodial particles of narrow size distribution and having a mean particle diameter of from about 0.1 to about 0.3 .mu.m by hydrolyzing hydrocarbyl zinc hydrocarboxides, such as ethyl zinc t-butoxide.
    Type: Grant
    Filed: February 14, 1985
    Date of Patent: February 28, 1989
    Assignee: The Dow Chemical Company
    Inventor: Robert H. Heistand, II
  • Preparation of 2-substituted-1,3-dioxacycloalkanes from diols and diunsaturated ethers
    Patent number: 4761491
    Abstract: 2-Substituted-1,3-dioxacycloalkanes (also known as acetonides) (such as ##STR1## (4-hydroxy-2,2-dimethyl-1,3-benzodioxole)) are prepared by reacting a diol (such as 1,2,3-trihydroxybenzene) and a diunsaturated ether (such as diisopropenyl ether). The reaction is exothermic and produces a ketone as the only by-product. The invention has utility in hydroxyl moiety "protection" and in pesticide synthesis.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: August 2, 1988
    Assignee: The Dow Chemical Company
    Inventor: Robert H. Heistand, II
  • Thin tape for dielectric materials
    Patent number: 4752857
    Abstract: An improved, flexible, strong, thin precursor green tape for dielectric ceramics is described. The tape is prepared from a cellulosic resin of specific characteristics. The tape is especially useful in the preparation of multilayer capacitors and related electronic devices.
    Type: Grant
    Filed: August 19, 1986
    Date of Patent: June 21, 1988
    Assignee: The Dow Chemical Company
    Inventors: Issam A. Khoury, Robert H. Heistand, II, Iwao Kohatsu
  • Catalysts having alkoxide-modified supports and method of increasing the catalytic activity of a catalytic metal
    Patent number: 4748145
    Abstract: A catalyst composition comprising a catalytic metal and a support, the support being prepared by depositing a metal alkoxide on a core support, then calcining the support.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: May 31, 1988
    Assignee: The Dow Chemical Company
    Inventors: Clayton D. Wood, Philip E. Garrou, Edward F. Gleason, III, Iwao Kohatsu
  • Process for preparing p-isopropenyl phenol
    Patent number: 4717777
    Abstract: A process for the preparation of alpha-alkenyl aromatic compounds, such as p-isopropenyl phenol, via the cleavage of cleavable organic compounds, e.g. dihydroxydiaryl alkanes such as bisphenol A, wherein an improved alkaline catalyst is employed. The catalyst comprises a metal oxide support component modified by an alkali metal hydroxide.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: January 5, 1988
    Assignee: The Dow Chemical Company
    Inventors: Juan M. Garces, John W. Robinson
  • Disproportionation of alkenes
    Patent number: 4709115
    Abstract: A catalytic process for the disproportionation of alkenes in a distillation column reactor, whereby high conversion and selectivity are simultaneously achieved.
    Type: Grant
    Filed: October 9, 1986
    Date of Patent: November 24, 1987
    Assignee: The Dow Chemical Company
    Inventors: Chu W. Jung, Philip E. Garrou, Gary R. Strickler
  • Method of preparing supported catalysts
    Patent number: 4689316
    Abstract: Metal vapor may be deposited on catalyst supports to produce supported catalysts. This process allows deposition deep in the pores of the catalyst support without the impregnation problems of liquid phase deposition of catalytic material on porous catalyst supports.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: August 25, 1987
    Assignee: The Dow Chemical Company
    Inventor: Robert G. Bowman
  • Catalysts having alkoxide-modified supports
    Patent number: 4686314
    Abstract: A catalyst composition comprising a catalytic metal and a support, the support being prepared by depositing a metal alkoxide on a core support, then calcining the support.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: August 11, 1987
    Assignee: The Dow Chemical Company
    Inventors: Clayton D. Wood, Arthur E. Read, Jr.
  • Methanation catalyst
    Patent number: 4666881
    Abstract: Selectively produce methane under Fischer-Tropsch conditions using a catalyst consisting essentially of ruthenium supported on an oxide of tantalum, niobium, vanadium or mixtures thereof, the support preparation including calcination at a temperature such that essentially no crystalline metal oxide is detectable by X-ray diffraction prior to deposition of the catalytic metal.
    Type: Grant
    Filed: March 19, 1986
    Date of Patent: May 19, 1987
    Assignee: The Dow Chemical Company
    Inventors: Clayton D. Wood, Edward F. Gleason
  • Catalyst for preparing p-isopropenyl phenol
    Patent number: 4657890
    Abstract: An improved alkaline catalyst which is especially useful in the preparation of alpha-alkenyl aromatic compounds, such as p-isopropenylphenol, via the cleavage of cleavable organic compounds, e.g., dihydroxydiaryl alkanes such as bisphenol A.
    Type: Grant
    Filed: September 20, 1985
    Date of Patent: April 14, 1987
    Assignee: The Dow Chemical Company
    Inventors: Juan M. Garces, John W. Robinson