US2806271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of casting titanium and related metal and alloys
Assignee: Howmet Turbine Components Corp
•
Filing: 1956-04-05
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Granted: 1957-09-17
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Expires: 1976-04-05
Abstract
No abstract record available.
Inventors
- 👤 Operhall Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:23
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22D; B22D18/00; B22D18/06; B22D23/00; B22D23/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN THE METHOD OF CASTING WITH A METAL OF GROUP IV-A, THE STEPS OF FORMING AN EXPENDABLE PATTERN OF THE ARTICLE TO BE MOLDED, DEPOSITING A METAL CORRESPONDING TO THE METAL TO BE CAST AS A CONTINUOUS THIN BARRIER FILM HAVING A THICKNESS OF LESS THAN .0003 OF AN INCH ON THE SURFACE OF THE EXPENDABLE PATTERN, DEPOSITING ANOTHER METAL HAVING HIGH HEAT CONDUCTIVITY AS AN OUTER LAYER ON THE BARRIER FILM IN AN AMOUNT TO PROVIDE A THICKNESS SUFFICIENT TO CONDUCT HEAT AWAY FROM THE SURFACE PORTION OF THE MOLTEN METAL CAST INTO THE MOLD TO PREVENT REDUCTION OF THE BARRIER FILM TO MOLTEN CONDITIONS, INVESTING THE EXPENDABLE PATTERN IN A MOLD BODY, REMOVING THE EXPENDABLE PATTERN AT A TEMPERATURE BELOW THE MELTING POINT TEMPERATURE FOR THE METALS WHEREBY THE BARRIER FILM REMAINS
Claim 2
Dependent Claim
134 words
IN THE METHOD OF CASTING WITH A METAL OF GROUP IV-A, THE STEPS OF FORMING AN EXPENDABLE PATTERN OF THE ARTICLE TO BE MOLDED, DEPOSITING A METAL CORRESPONDING TO THE METAL TO BE CAST AS A CONTINUOUS THIN BARRIER FILM HAVING A THICKNESS OF LESS THAN .0003 OF AN INCH ON THE SURFACE OF THE EXPENDABLE PATTERN, DEPOSITING ANOTHER METAL HAVING HIGH HEAT CONDUCTIVITY AS AN OUTER LAYER ON THE BARRIER FILM IN AN AMOUNT TO PROVIDE A THICKNESS SUFFICIENT TO CONDUCT HEAT AWAY FROM THE SURFACE PORTION OF THE MOLTEN METAL CAST INTO THE MOLD TO PREVENT REDUCTION OF THE BARRIER FILM TO MOLTEN CONDITIONS, INVESTING THE EXPENDABLE PATTERN IN A MOLD BODY, REMOVING THE EXPENDABLE PATTERN AT A TEMPERATURE BELOW THE MELTING POINT TEMPERATURE FOR THE METALS WHEREBY THE BARRIER FILM REMAINS
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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) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |