Patent US4879094A successfully refreshed from Google Patents.
US4879094A
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US
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Cu--Sn--Zn--Bi alloys
Assignee: Aalberts Integrated Piping Systems Ltd
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Filing: 1988-10-17
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Granted: 1989-11-07
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Expires: 2008-10-17
Abstract
Abstract An alloy for the manufacture of cast components, for example taps, water meters, pipe couplings and parts thereof, intended for use in potable water supply installations comprises 1.5 to 7 wt % bismuth, from 5 to 15 wt % zinc, from 1 to 12 wt % tin, the balance apart from any impurities and any minor amounts of elemental additives being copper.
Inventors
- 👤 William Rushton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:49
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
32 words
A substantially lead free alloy containing from 1.5 to 7 wt % bismuth, from 5 to 15 wt % zinc, from 1 to 12 wt % tin, the balance being essentially copper.
Claim 2
Dependent Claim
32 words
A substantially lead free alloy containing from 1.5 to 7 wt % bismuth, from 5 to 15 wt % zinc, from 1 to 12 wt % tin, the balance being essentially copper.
Claim 3
Dependent Claim
14 words
An alloy according to claim 1 containing from 1.5 to 5 wt % bismuth.
Claim 4
Dependent Claim
14 words
An alloy according to claim 2 containing from 2 to 3 wt % bismuth.
Claim 5
Dependent Claim
14 words
An alloy according to claim 1 containing from 5 to 12 wt % zinc.
Claim 6
Dependent Claim
14 words
An alloy according to claim 4 containing from 6 to 8 wt % zinc.
Claim 7
Dependent Claim
14 words
An alloy according to claim 1 containing from 2.5 to 5 wt % tin.
Claim 8
Dependent Claim
29 words
An alloy according to claim 1 comprising from 2 to 2.2 wt % bismuth, from 7.1 to 7.8 wt % zinc and from 3.3 to 3.6 wt % tin.
Claim 9
Dependent Claim
14 words
An alloy according to claim 1 including impurities not exceeding about 1% by weight.
Claim 10
Dependent Claim
17 words
An alloy according to claim 1 wherein any lead content does not exceed about 0.4 wt %.
Claim 11
Dependent Claim
14 words
An alloy according to claim 1 including additives not exceeding about 3% by weight.
Claim 12
Dependent Claim
13 words
An alloy according to claim 10 including up to 2 wt % nickel.
Claim 13
Dependent Claim
42 words
A component for use in a water supply installation comprising a substantially lead free alloy containing from 1.5 to 7 wt % bismuth, from 5 to 15 wt % zinc, from 1 to 12 wt % tin, the balance being essentially copper.
Claim 14
Dependent Claim
42 words
A component for use in a water supply installation comprising a substantially lead free alloy containing from 1.5 to 7 wt % bismuth, from 5 to 15 wt % zinc, from 1 to 12 wt % tin, the balance being essentially copper.
References Cited (Backward Citations)
GB509657A
Cited
GB519597A
Cited
JPS54135618A
Cited
JPS5773149A
Cited
JPS5773150A
Cited
JPS5950143A
Cited
JPS61133357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |