Patent US2583438A successfully refreshed from Google Patents.
US2583438A
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US
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Method and apparatus for eliminating impurities from metals which are in a fluid state
Assignee: Individual
•
Filing: 1947-09-05
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Granted: 1952-01-22
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Expires: 1967-09-05
Abstract
No abstract record available.
Inventors
- 👤 Henry W Nieman
- 👤 Chauncy W Nieman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:41
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; C; C22; C22B; C22B43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE METHOD OF REMOVING SURFACE IMPURITIES FROM A BODY OF MERCURY FREE OF INTERNAL CONTAMINATION WHICH COMPRISES WITHDRAWING MERCURY FROM SAID BODY IN THE FORM OF A STREAM, PASSING THE STREAM THROUGH A DISCHARGE PORT COMPRISING A BAND FORMED ESSENTIALLY OF GOLD AND THE EXPOSED INNER SURFACE OF WHICH WILL BE WETTED BY SUBSTANTIALLY PURE MERCURY WHEN BROUGHT INTO CONTACT THEREWITH, AND INTERRUPTING SUCH STREAM FLOW PRIOR TO THE PASSAGE OF THE ENTIRE MERCURY BODY THEREOF THROUGH SAID BAND TO MAINTAIN AT SAID BAND A SEAL BETWEEN THE SURFACE OF THE BAND AND THE MERCURY CONTACTING THE SAME AND THUS PREVENT THE PASSAGE THROUGH SAID PORT OF ANY IMPURITIES WHICH MAY HAVE BEEN PRESENT UPON THE SURFACE OF THE ORIGINAL BODY.
Claim 2
Independent Claim
121 words
THE METHOD OF REMOVING SURFACE IMPURITIES FROM A BODY OF MERCURY FREE OF INTERNAL CONTAMINATION WHICH COMPRISES WITHDRAWING MERCURY FROM SAID BODY IN THE FORM OF A STREAM, PASSING THE STREAM THROUGH A DISCHARGE PORT COMPRISING A BAND FORMED ESSENTIALLY OF GOLD AND THE EXPOSED INNER SURFACE OF WHICH WILL BE WETTED BY SUBSTANTIALLY PURE MERCURY WHEN BROUGHT INTO CONTACT THEREWITH, AND INTERRUPTING SUCH STREAM FLOW PRIOR TO THE PASSAGE OF THE ENTIRE MERCURY BODY THEREOF THROUGH SAID BAND TO MAINTAIN AT SAID BAND A SEAL BETWEEN THE SURFACE OF THE BAND AND THE MERCURY CONTACTING THE SAME AND THUS PREVENT THE PASSAGE THROUGH SAID PORT OF ANY IMPURITIES WHICH MAY HAVE BEEN PRESENT UPON THE SURFACE OF THE ORIGINAL BODY.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |