Global Patent Index - EP 0711843 A3

EP 0711843 A3 19961211 - Use of a copper-zinc alloy for fresh water installations

Title (en)

Use of a copper-zinc alloy for fresh water installations

Title (de)

Verwendung einer Kupfer-Zink-Legierung für Trinkwasserinstallationen

Title (fr)

Utilisation d'un alliage de cuivre-zinc pour installations d'eau potable

Publication

EP 0711843 A3 19961211 (DE)

Application

EP 95116168 A 19951013

Priority

DE 4438485 A 19941028

Abstract (en)

[origin: EP0711843A2] The use of a Cu-Zn alloy for drinking water installations, esp. for mfg. armatures, connectors and various objects in periodic or long-term contact with drinking water, is claimed. The alloy has a ratio of Cu to Zn of 1.3-2 and also contains: (a) 0.1-5% thermally stable dispersoids selected from Cr2Ta, Dy2O3, Er2O3, MoB, Mo2C, NbC, Nd2O3, Sm2O3, WS2, Yb2O3, ZrC and/or (b) 0.1-5% intermetallic phases made of Cu and/or Zn with at least one from La, Y, Zr and/or (c) intermetallic phases made without Cu and/or Zn and selected from 0.1-5% Ce, Co, La, Ni and 0.1-5% Al, Nb, Sb, Sn, Ti, and/or (d) thermally active precipitates of 1-5% Ag, Al, Co, Mg, or Ti.

IPC 1-7

C22C 9/04

IPC 8 full level

C22C 9/04 (2006.01); C22C 32/00 (2006.01)

CPC (source: EP US)

C22C 9/04 (2013.01 - EP US); C22C 32/00 (2013.01 - EP US)

Citation (search report)

  • [XP] WO 9426945 A1 19941124 - KOHLER CO [US], et al
  • [X] US 5330712 A 19940719 - SINGH AKHILESHWAR R [US]
  • [A] WO 9324670 A1 19931209 - HETZEL & CO METALLHUETTENWERK [DE], et al
  • [AD] US 5167726 A 19921201 - LOIACONO DOMINIC N [US], et al
  • [A] US 5256214 A 19931026 - ASHOK SANKARANARAYANAN [US]
  • [A] US 4139378 A 19790213 - BANKOWSKI RICHARD S, et al
  • [X] DATABASE WPI Section Ch Week 8917, Derwent World Patents Index; Class M26, AN 89-126544, XP002011870
  • [A] DRESHER W.H. AND PETERS D.T.: "Lead-free and reduced-lead copper-base cast plumbing alloys, Part 1", METALL, vol. 46, no. 11, November 1992 (1992-11-01), pages 1142 - 1146, XP000602515
  • [A] DRESHER W.H. AND PETERS D.T.: "Lead-free and reduced-lead copper-base cast plumbing alloys, Part 2", METALL, vol. 47, no. 1, January 1993 (1993-01-01), pages 26 - 33, XP000602516

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

DE 4438485 A1 19960502; DE 4438485 C2 19980520; DE 59505964 D1 19990624; EP 0711843 A2 19960515; EP 0711843 A3 19961211; EP 0711843 B1 19990519; FI 111856 B 20030930; FI 955074 A0 19951025; FI 955074 A 19960429; US 5766377 A 19980616

DOCDB simple family (application)

DE 4438485 A 19941028; DE 59505964 T 19951013; EP 95116168 A 19951013; FI 955074 A 19951025; US 71449896 A 19960916