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US4584173A Expired / Lapsed US ⏱️ 0.0 years remaining

Aluminium alloys

Assignee: BRITISH ALUMINIUM Ltd
•
Filing: 1984-10-09
•
Granted: 1986-04-22
•
Expires: 2004-10-09
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Abstract

Abstract An aluminium base alloy having a composition within the following ranges in weight percent: ______________________________________ Lithium 2.1-2.9 Magnesium 3.0-5.5 Copper 0.2-0.7 and ______________________________________ one or more constituents selected from the group consisting of Zirconium, Hafnium and Niobium as follows:______________________________________Zirconium 0.05-0.25Hafnium 0.10-0.50Niobium 0.05-0.30 andZinc 0-2.0Titanium 0-0.5Manganese 0-0.5Nickel 0-0.5Chromium 0-0.5Germanium 0-0.2Aluminium Remainder (apart from incidental impurities).______________________________________

Inventors

  • 👤 Alan Gray
  • 👤 William S. Miller

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 03:07
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/06

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 68 words
An aluminium base alloy having a composition consisting essentially of the following ranges in weight percent: ______________________________________ Lithium 2.1-2.9 Magnesium 3.0-5.5 Copper 0.2-0.7 and ______________________________________ one or more constituents selected from the group consisting of Zirconium, Hafnium and Niobium as follows: ______________________________________ Zirconium 0.05-0.25 Hafnium 0.10-0.50 Niobium 0.05-0.30 and Zinc 0-2.0 Titanium 0-0.5 Manganese 0-0.5 Nickel 0-0.5 Chromium 0-0.5 Germanium 0-0.2 Aluminium Remainder (apart from incidental impurities). ______________________________________
Claim 2
Dependent Claim 68 words
An aluminium base alloy having a composition consisting essentially of the following ranges in weight percent: ______________________________________ Lithium 2.1-2.9 Magnesium 3.0-5.5 Copper 0.2-0.7 and ______________________________________ one or more constituents selected from the group consisting of Zirconium, Hafnium and Niobium as follows: ______________________________________ Zirconium 0.05-0.25 Hafnium 0.10-0.50 Niobium 0.05-0.30 and Zinc 0-2.0 Titanium 0-0.5 Manganese 0-0.5 Nickel 0-0.5 Chromium 0-0.5 Germanium 0-0.2 Aluminium Remainder (apart from incidental impurities). ______________________________________
Claim 3
Dependent Claim 13 words
An alloy according to claim 1 containing 0.1 to 0.15 weight percent Zirconium.
Claim 4
Dependent Claim 14 words
An alloy according to claim 1 containing Lithium in the range 2.4 to 2.6%.
Claim 5
Dependent Claim 11 words
An alloy according to claim 3 containing 3.8 to 4.2% Magnesium.
Claim 6
Dependent Claim 11 words
An alloy according to claim 4 containing 0.4 to 0.6% Copper.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-04-21 1989-10-21 1990-04-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-04-21 1993-10-21 1994-04-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-04-21 1997-10-21 1998-04-22 $7700.00 Window Closed / Lapsed

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