Patents Assigned to Timminco Limited
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Patent number: 6210460Abstract: Compositions suitable for use as an inoculant for cast iron. The composition includes granules of intermetallic alloys selected from Al4Sr, Al2Sr, and AlSr. The composition consists essentially of 40 to 81 percent strontium by weight.Type: GrantFiled: December 18, 1998Date of Patent: April 3, 2001Assignee: Timminco LimitedInventors: Douglas J. Zuliani, Bahadir Kulunk
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Patent number: 6132530Abstract: Aluminum-strontium enriched master alloy granules for use primarily in modifying the eutectic phase in aluminum-silicon casting alloys. The master alloy granules are predominantly intermetallic compounds Al.sub.4 Sr, Al.sub.2 Sr or AlSr and mixtures thereof. By using such intermetallic dominant alloys in a granulated state rapid dissolution in aluminum-silicon alloy melts is achieved. The master alloy composition can be directly added to a content of the melt or injected into it. The master alloy composition can also be mixed with aluminum granules and extruded into a rod or entrained into a billet of cast aluminum.Type: GrantFiled: November 10, 1998Date of Patent: October 17, 2000Assignee: Timminco LimitedInventors: Douglas J. Zuliani, Bahadir Kulunk
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Patent number: 5882443Abstract: Aluminum-strontium enriched master alloy granules for use primarily in modifying the eutectic phase in aluminum-silicon casting alloys. The master alloy granules are predominantly intermetallic compounds Al.sub.4 Sr, Al.sub.2 Sr or Alsr and mixtures thereof. By using such intermetallic dominant alloys in a granulated state rapid dissolution in aluminum-silicon alloy melts is achieved. The master alloy composition can be directly added to a content of the melt or injected into it. The master alloy composition can also be mixed with aluminum granules and extruded into a rod or entrained into a billet of cast aluminum.Type: GrantFiled: June 28, 1996Date of Patent: March 16, 1999Assignee: Timminco LimitedInventors: Douglas J. Zuliani, Bahadir Kulunk
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Patent number: 5547634Abstract: Process and apparatus for adding calcium and aluminum to molten lead to produce a lead-calcium alloy suitable for battery grids. Particles of calcium and aluminum metal or alloys thereof are fed into the interior of a tubular housing having a wall extending down into the molten lead and having a bottom opening at a relatively large depth below the lead surface and having openings in its wall at a relatively small depth below the lead surface. A rotary impeller which acts at least partially as a centrifugal impeller is positioned in the housing to cause swirling of lead carrying the particles within the housing, the shape of the housing and the nature and position of the impeller being such as to ensure that lead carrying the particles is swirled against the housing wall and recirculated within the housing before the lead leaves the housing.Type: GrantFiled: November 30, 1994Date of Patent: August 20, 1996Assignee: Timminco LimitedInventors: Stephen G. Hibbins, Fernando A. Timpano, Douglas J. Zuliani
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Patent number: 5143693Abstract: A novel alloy for use in lead refining is disclosed comprised substantially of magnesium and calcium. The preferred ratio on a weight basis of magnesium to calcium is between about 1.2:1 to about 3.0:1. A method of refining a lead bath with the novel alloy is disclosed which provides a high recovery ratio of impurities present therein.Type: GrantFiled: March 22, 1991Date of Patent: September 1, 1992Assignee: Timminco LimitedInventors: Douglas J. Zuliani, Bernard Closset
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Patent number: 5055254Abstract: Magnesium alloys having improved corrosion resistance, one alloy containing not more than 0.0024% iron, 0.010% nickel and 0.0024% copper and not less than 0.15% manganese and the other containing not more than 0.0015% iron, 0.0010% nickel and 0.0010% copper and not less than 0.15% manganese.Type: GrantFiled: October 5, 1989Date of Patent: October 8, 1991Assignee: Timminco LimitedInventor: Douglas J. Zuliani
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Patent number: 5041160Abstract: A novel alloy for use in lead refining is disclosed comprised substantially of magnesium and calcium. The preferred ratio on a weight basis of magnesium to calcium is between about 1.2:1 to about 5.2:1. A method of refining a lead bath with the novel alloy is disclosed which provides a high recovery ratio of impurities present therein.Type: GrantFiled: December 5, 1989Date of Patent: August 20, 1991Assignee: Timminco LimitedInventors: Douglas J. Zuliani, Bernard Closset
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Patent number: 4937044Abstract: A master alloy containing strontium magnesium and aluminum for modifying the aluminum-silicon eutectic phase of hypoeutectic, eutectic and hypereutectic aluminum-silicon based casting alloys.Type: GrantFiled: October 5, 1989Date of Patent: June 26, 1990Assignee: Timminco LimitedInventor: Bernard Closset