Patent US2519336A successfully refreshed from Google Patents.
Patent US3900349A successfully refreshed from Google Patents.
US3900349A
Expired / Lapsed
US
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Silicon brass resistant to parting corrosion
Assignee: General Electric Co
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Filing: 1974-03-19
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Granted: 1975-08-19
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Expires: 1994-03-19
Abstract
Abstract This disclosure relates to silicon brass alloys in which corrosion resistance is obtained by the addition of a small amount of an inhibitor, such as arsenic, to provide an alloy which when properly heat treated has substantial resistance to parting corrosion in waters which contain corrosiive ingredients such as are found in many public water supplies.
Inventors
- 👤 Louis P Costas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:21
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
108 words
A SILICON BRASS ALLOY RESISTANT TO PARTING CORROSION CONSISTING ESSENTIALLY OF ABOUT 3-21 PERCENT BY WEIGHT ZINC, AN AMOUNT OF SILICON IN THE RANGE OF ABOUT 2.5 TO ABOUT 7 PERCENT, SAID AMOUNTS OF ZINC AND SILICON BEING SUFFICIENT TO PRODUCE A STRUCTURE CONSISTING OF ALPHA PLUS ZETA PHASES IN THE BRASS, FROM ABOUT 0.030 PERCENT UP TO THE PERCENTAGE BY WEIGHT OF SOLID SOLUBILITY OF ONE MORE ELEMENTS OF THE GROUP CONSISTING OF ARSENIC, ANTIMONY AND PHOSPHORUS REMAINDER ESSENTIALLY COPPER, SAID ALLOY HAVING BEEN RAPIDLY COOLED TO ROOM TEMPERATURE FROM A TEMPERATURE IN THE RANGE OF 500*C TO 760*C AND CONSISTING OF ALPHA PLUS ZETA MICRO STRCTURE.
Claim 2
Dependent Claim
108 words
A SILICON BRASS ALLOY RESISTANT TO PARTING CORROSION CONSISTING ESSENTIALLY OF ABOUT 3-21 PERCENT BY WEIGHT ZINC, AN AMOUNT OF SILICON IN THE RANGE OF ABOUT 2.5 TO ABOUT 7 PERCENT, SAID AMOUNTS OF ZINC AND SILICON BEING SUFFICIENT TO PRODUCE A STRUCTURE CONSISTING OF ALPHA PLUS ZETA PHASES IN THE BRASS, FROM ABOUT 0.030 PERCENT UP TO THE PERCENTAGE BY WEIGHT OF SOLID SOLUBILITY OF ONE MORE ELEMENTS OF THE GROUP CONSISTING OF ARSENIC, ANTIMONY AND PHOSPHORUS REMAINDER ESSENTIALLY COPPER, SAID ALLOY HAVING BEEN RAPIDLY COOLED TO ROOM TEMPERATURE FROM A TEMPERATURE IN THE RANGE OF 500*C TO 760*C AND CONSISTING OF ALPHA PLUS ZETA MICRO STRCTURE.
Claim 3
Dependent Claim
14 words
The alloy of claim 1 having about 0.06% by weight arsenic as the element.
References Cited (Backward Citations)
US2075005A
Cited
US2061921A
Cited
US2118688A
Cited
US2369813A
Cited
US2394673A
Cited
US3402043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |