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US2857641A
Expired / Lapsed
US
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Disposable mercury alloy pattern and method of making the same
Assignee: Mercast Corp
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Filing: 1955-09-16
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Granted: 1958-10-28
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Expires: 1975-09-16
Abstract
No abstract record available.
Inventors
- 👤 Irvin R Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:49
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A DISPOSABLE CASTING PATTERN SUITABLE FOR FORMING A SHELL MOLD WITH AN INVESTMENT COMPOSITION APPLIED TO THE SURFACES OF SAID PATTERN, WHICH PATTERN CONSISTS OF A SOLID PATTERN MATERIAL SELECTED FROM THE GROUP CONSISTING OF HG5TL2, A MIXTURE OF HG5TL2 WITH HG2TL, AND A MIXTURE OF HGG5TL2 WITH HG3TIL, AND IN COMBINATION WITH SAID PATTERN A PROTECTIVE LIQUID IN CONTACT WITH THE SURFACES OF SAID PATTERN FOR MAINTAINING SAID SURFACES SUBSTANTIALLY FREE OF OXYGEN COMPOUNDS AND WITH A SHINY EXTERIOR SIMILAR TO THE SHINY EXTERIOR SURFACE OF SOLIDIFIED FROZEN PURE MERCURY, AND A PROTECTIVE ION EXCHANGE AGENT ASSOCIATED WITH SAID LIQUID FOR MAINTAINING SAID LIQUID SUBSTANTIALLY FREE OF THALLIUM ION IMPURITIES.
Claim 2
Dependent Claim
111 words
A DISPOSABLE CASTING PATTERN SUITABLE FOR FORMING A SHELL MOLD WITH AN INVESTMENT COMPOSITION APPLIED TO THE SURFACES OF SAID PATTERN, WHICH PATTERN CONSISTS OF A SOLID PATTERN MATERIAL SELECTED FROM THE GROUP CONSISTING OF HG5TL2, A MIXTURE OF HG5TL2 WITH HG2TL, AND A MIXTURE OF HGG5TL2 WITH HG3TIL, AND IN COMBINATION WITH SAID PATTERN A PROTECTIVE LIQUID IN CONTACT WITH THE SURFACES OF SAID PATTERN FOR MAINTAINING SAID SURFACES SUBSTANTIALLY FREE OF OXYGEN COMPOUNDS AND WITH A SHINY EXTERIOR SIMILAR TO THE SHINY EXTERIOR SURFACE OF SOLIDIFIED FROZEN PURE MERCURY, AND A PROTECTIVE ION EXCHANGE AGENT ASSOCIATED WITH SAID LIQUID FOR MAINTAINING SAID LIQUID SUBSTANTIALLY FREE OF THALLIUM ION IMPURITIES.
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) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |