US4128418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enhanced grain growth in arsenic modified copper-zinc brasses
Assignee: Olin Corp
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Filing: 1977-07-11
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Granted: 1978-12-05
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Expires: 1997-07-11
Abstract
Abstract A copper-zinc brass alloy is disclosed which exhibits enhanced grain growth characteristics when modified with from 0.02 to 0.80 percent by weight arsenic.
Inventors
- 👤 John M. Vitek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:19
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
A brass alloy having deep drawing properties and exhibiting enhanced grain growth consisting of from about 8.0 to about 34.0 weight percent zinc, from about 0.4 to about 0.8 weight percent arsenic and the remainder copper, said alloy exhibiting a grain size of at least about 50 microns after cold rolling at least 57% and annealing at a temperature of 525° C. for 1 hour.
Claim 2
Dependent Claim
65 words
A brass alloy having deep drawing properties and exhibiting enhanced grain growth consisting of from about 8.0 to about 34.0 weight percent zinc, from about 0.4 to about 0.8 weight percent arsenic and the remainder copper, said alloy exhibiting a grain size of at least about 50 microns after cold rolling at least 57% and annealing at a temperature of 525° C. for 1 hour.
Claim 3
Dependent Claim
22 words
A brass alloy according to claim 1 wherein said arsenic is present in the amount of about 0.4 to 0.5 weight percent.
Claim 4
Dependent Claim
22 words
A brass alloy according to claim 1 wherein said zinc is present in the amount of about 25.0 to 34.0 weight percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |