Patent US3622024A successfully refreshed from Google Patents.
US2807848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of mercury casting
Assignee: Mechanical Res Ltd
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Filing: 1955-06-02
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Granted: 1957-10-01
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Expires: 1975-06-02
Abstract
No abstract record available.
Inventors
- 👤 Charles A Clements
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:11
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
THE METHOD OF MAKING A CASTING PATTERN OF FROZEN MERCURY, COMPRISING FORMING A MOLD WITH A DIE CAVITY HAVING THE SHAPE OF THE CASTING PATTERN, WITH AT LEAST ONE COMPLEMENTARY MOLD MEMBER OF SAID MOLD BEING BEING FORMED OF METAL CONSISTING PRINCIPALLY OF ALUMINUM, PROVIDING AN ELECTROLYTIC ANODIZING BATH CONTAINING A COLORING DYE, SUBJECTING ALL EXTERIOR SURFACES OF THE ALUMINUM MOLD MEMBER TO ELECTROLYTIC ANODIZING TREATMENT IN SAID BATH FOR A SUFFICIENT TIME AND AT SUFFICIENT VOLTAGE FOR PRODUCING ON THE ENTIRE EXTERIOR SURFACE OF SAID MOLD MEMBER A SUBSTANTIALLY CONTINUOUS LAYER OF ALUMINUM OXIDE COATING OF THICKNESS DETERMINED BY ATTENUATION OF THE ANODIC PROCESS, REPEATEDLY PHOTOMETRICALLY TESTING THE DENSITY OF COLOR PRODUCED AS INTEGRAL WITH THE COATING REPEATING THE ANODIZING PROCESS UNTIL THE LAYER OF OXIDE OF SUFFICIENT DEPTH HAS BEEN UNIFORMLY ATTAINED, SEALING THE ALUMINUM OXIDE PORES WITH BOILING WATER, THEREAFTER ASSEMBLING THE SO-TREATED ALUMINUM MOLD MEMBER WITH THE OTHER COMPLEMENTARY MEMBERS TO PROVIDE SAID MOLD CAVITY, THEREAFTER FILLING SAID MOLD CAVITY WITH LIQUID MERCURY, AND COOLING THE LIQUID MERCURY FILLING THE MOLD CAVIAFTER REMOVING THE FROZEN MERCURY PATTERN FROM SAID DIE CAVITY.
Claim 2
Independent Claim
185 words
THE METHOD OF MAKING A CASTING PATTERN OF FROZEN MERCURY, COMPRISING FORMING A MOLD WITH A DIE CAVITY HAVING THE SHAPE OF THE CASTING PATTERN, WITH AT LEAST ONE COMPLEMENTARY MOLD MEMBER OF SAID MOLD BEING BEING FORMED OF METAL CONSISTING PRINCIPALLY OF ALUMINUM, PROVIDING AN ELECTROLYTIC ANODIZING BATH CONTAINING A COLORING DYE, SUBJECTING ALL EXTERIOR SURFACES OF THE ALUMINUM MOLD MEMBER TO ELECTROLYTIC ANODIZING TREATMENT IN SAID BATH FOR A SUFFICIENT TIME AND AT SUFFICIENT VOLTAGE FOR PRODUCING ON THE ENTIRE EXTERIOR SURFACE OF SAID MOLD MEMBER A SUBSTANTIALLY CONTINUOUS LAYER OF ALUMINUM OXIDE COATING OF THICKNESS DETERMINED BY ATTENUATION OF THE ANODIC PROCESS, REPEATEDLY PHOTOMETRICALLY TESTING THE DENSITY OF COLOR PRODUCED AS INTEGRAL WITH THE COATING REPEATING THE ANODIZING PROCESS UNTIL THE LAYER OF OXIDE OF SUFFICIENT DEPTH HAS BEEN UNIFORMLY ATTAINED, SEALING THE ALUMINUM OXIDE PORES WITH BOILING WATER, THEREAFTER ASSEMBLING THE SO-TREATED ALUMINUM MOLD MEMBER WITH THE OTHER COMPLEMENTARY MEMBERS TO PROVIDE SAID MOLD CAVITY, THEREAFTER FILLING SAID MOLD CAVITY WITH LIQUID MERCURY, AND COOLING THE LIQUID MERCURY FILLING THE MOLD CAVIAFTER REMOVING THE FROZEN MERCURY PATTERN FROM SAID DIE CAVITY.
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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |