Patents by Inventor Prakash D. Parikh

Prakash D. Parikh 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).

  • Cast copper alloys
    Patent number: 4412871
    Abstract: The disclosure teaches improved cast copper alloys exhibiting surprisingly good hot rollability and a method of processing copper base alloys to provide cast structures having good hot rollability, especially those containing silicon and tin. In accordance with the method of the invention, ingots are direct chill cast in a mold from liquid metal wherein the melt temperature entering the mold is 100.degree. to 350.degree. C. in excess of the liquidus temperature.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: November 1, 1983
    Assignee: Olin Corporation
    Inventors: Prakash D. Parikh, Louis P. Stone, Eugene Shapiro, Derek E. Tyler
  • Cast copper alloys
    Patent number: 4396444
    Abstract: The disclosure teaches improved cast copper alloys exhibiting surprisingly good hot rollability and a method of processing copper base alloys to provide cast structures having good hot rollability, especially those containing silicon and tin. In accordance with the method of the invention, ingots are direct chill cast in a mold from liquid metal wherein the melt temperature entering the mold is 100.degree. to 350.degree. C. in excess of the liquidus temperature.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: August 2, 1983
    Assignee: Olin Corporation
    Inventors: Prakash D. Parikh, Louis P. Stone, Eugene Shapiro, Derek E. Tyler
  • Modification of leaded brasses to improve hot workability
    Patent number: 4180398
    Abstract: Leaded brasses are modified by additions of chromium, antimony and bismuth in order to reduce the susceptibility of the brasses to edge cracking during hot working. The additional alloying elements also help to maintain the widely known good machinability characteristics of the leaded brasses.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: December 25, 1979
    Assignee: Olin Corporation
    Inventor: Prakash D. Parikh
  • Minimization of edge cracking during hot rolling of silicon-tin bronzes
    Patent number: 4148633
    Abstract: Particular copper base alloys consisting essentially of silicon, tin and mischmetal are disclosed which exhibit improved resistance to edge cracking during hot working operations. Various other elements such as chromium, manganese, iron and nickel may also be added to the alloy to increase the strength properties of the alloy without affecting the hot workability improvement brought about by the mischmetal addition to the copper-silicon-tin base.
    Type: Grant
    Filed: October 26, 1977
    Date of Patent: April 10, 1979
    Assignee: Olin Corporation
    Inventor: Prakash D. Parikh
  • Improved copper base alloys
    Patent number: 4110132
    Abstract: The instant disclosure teaches a process for obtaining an improved combination of strength and bend properties in copper base alloys having low stacking fault energy. The process is characterized by a critical combination of cold reduction and annealing following recrystallization. Improved copper base alloys are also disclosed.
    Type: Grant
    Filed: July 5, 1977
    Date of Patent: August 29, 1978
    Assignee: Olin Corporation
    Inventors: Prakash D. Parikh, Eugene Shapiro
  • Processing copper base alloys
    Patent number: 4047978
    Abstract: The instant disclosure teaches a process for obtaining an improved combination of strength and bend properties in copper base alloys having low stacking fault energy. The process is characterized by a critical combination of cold reduction and annealing following recrystallization.
    Type: Grant
    Filed: September 29, 1976
    Date of Patent: September 13, 1977
    Assignee: Olin Corporation
    Inventors: Prakash D. Parikh, Eugene Shapiro
  • Process for treating copper alloys to improve thermal stability
    Patent number: 4025367
    Abstract: A process for improving the thermal stability of copper alloys having a low stacking fault energy is disclosed which comprises cold working the alloy, heating the alloy at a first temperature of from 100.degree. to 300.degree. C, additionally heating the alloy at a second temperature of from 200.degree. to 360.degree. C and cooling to room temperature. The second temperature must be higher than the first temperature.
    Type: Grant
    Filed: June 28, 1976
    Date of Patent: May 24, 1977
    Assignee: Olin Corporation
    Inventors: Prakash D. Parikh, Eugene Shapiro
  • Processing copper base alloys
    Patent number: 3956027
    Abstract: A process for obtaining improved bend properties in copper base alloys with retention of other desirable characteristics thereof. The process is characterized by a final cold reduction with a large number of passes coupled with a small reduction per pass.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: May 11, 1976
    Assignee: Olin Corporation
    Inventors: Prakash D. Parikh, Eugene Shapiro