Patent US2802733A successfully refreshed from Google Patents.
US2802733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing brass and bronze alloys containing lead
Assignee: Evonik Operations GmbH
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Filing: 1955-06-22
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Granted: 1957-08-13
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Expires: 1975-06-22
Abstract
No abstract record available.
Inventors
- 👤 Bungardt Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:02
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
AN IMPROVED PROCESS FOR PREVENTING LEAD FROM OOZING TO THE SURFACE OF LEADED BRASS AND BRONZE ALLOYS CONTAINING AT LEAST 50% COPPER AND BETWEEN ABOUT 1 AND 35% LEAD DURING THE CASTING THEREOF WHICH COMPRISES ADDING FROM ABOUT 2 TO 5% OF MISCH METAL TO SUCH AN ALLOY WHILE IN THE MOLTEN STATE, AND THEN CASTING THE ALLOY.
Claim 2
Dependent Claim
58 words
AN IMPROVED PROCESS FOR PREVENTING LEAD FROM OOZING TO THE SURFACE OF LEADED BRASS AND BRONZE ALLOYS CONTAINING AT LEAST 50% COPPER AND BETWEEN ABOUT 1 AND 35% LEAD DURING THE CASTING THEREOF WHICH COMPRISES ADDING FROM ABOUT 2 TO 5% OF MISCH METAL TO SUCH AN ALLOY WHILE IN THE MOLTEN STATE, AND THEN CASTING THE ALLOY.
References Cited (Backward Citations)
US2357190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |