Patent US2535536A successfully refreshed from Google Patents.
US2535536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flux for purifying metals
Assignee: American Metal Co Ltd
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Filing: 1948-12-21
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Granted: 1950-12-26
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Expires: 1968-12-21
Abstract
No abstract record available.
Inventors
- 👤 Elmer W Hagmaier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:31
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A FLUX-MIXTURE FOR PURIFYING SCRAP METALS AND REMOVING METALLIC IMPURITES, CONSISTING OF SAND AND BORAX IN THE PROPORTION OF ABOUT 47 TO 50% SAND AND ABOUT 53 TO 50% DEHYDRATED BORAX.
Claim 2
Dependent Claim
31 words
A FLUX-MIXTURE FOR PURIFYING SCRAP METALS AND REMOVING METALLIC IMPURITES, CONSISTING OF SAND AND BORAX IN THE PROPORTION OF ABOUT 47 TO 50% SAND AND ABOUT 53 TO 50% DEHYDRATED BORAX.
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) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |