US3982933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brass alloy
Assignee: Vereinigte Deutsche Metallwerke AG
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Filing: 1973-10-31
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Granted: 1976-09-28
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Expires: 1993-10-31
Abstract
Abstract A brass alloy consisting essentially of 57 to 62% by weight copper, 1 to 4% by weight lead and the balance zinc has improved machinability in terms of allowing high coating speeds or affording reduced coating tool wear, especially when the alloy is machined upon an automatic lathe, by the inclusion therein of 0.15 to 0.20% by weight each of tin and magnesium.
Inventors
- 👤 Gunther Rudolph
- 👤 Erhard Schelzke
- 👤 Antonio Leogrande
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:46
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
37 words
A brass alloy with improved machinability consisting essentially of 57 to 62% by weight copper, 1 to 4% by weight lead, 0.15 to 0.20% by weight magnesium, 0.15 to 0.20% by weight tin and the balance zinc.
Claim 2
Dependent Claim
37 words
A brass alloy with improved machinability consisting essentially of 57 to 62% by weight copper, 1 to 4% by weight lead, 0.15 to 0.20% by weight magnesium, 0.15 to 0.20% by weight tin and the balance zinc.
Claim 3
Dependent Claim
18 words
The alloy defined in claim 1 which contains copper in an amount of 57.5 to 59.5% by weight.
Claim 4
Dependent Claim
18 words
The alloy defined in claim 2 which contains lead in an amount of 1 to 3% by weight.
Claim 5
Dependent Claim
28 words
The alloy defined in claim 1 which consists essentially of Cu58, Zn39, Pb3 brass containing 0.15 to 0.20% by weight magnesium and 0.15 to 0.20% by weight tin.
Claim 6
Dependent Claim
13 words
The alloy defined in claim 4 which contains 0.16% magnesium and 0.15% tin.
References Cited (Backward Citations)
US3158470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |