US3239897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision casting mold and methods and materials for production and use
Assignee: Howmet Turbine Components Corp
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Filing: 1963-09-20
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Granted: 1966-03-15
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Expires: 1983-09-20
Abstract
No abstract record available.
Inventors
- 👤 Nick G Lirones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:49
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22C1/00; B22C1/16; B22C1/165
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
A DIP COAT COMPOSITION FOR USE IN FORMING A MOLD ABOUT A DISPOSABLE PATTERN FOR USE IN THE CASTING OF METALS, ALLOYS AND CERAMICS UPON REMOVAL OF THE DISPOSABLE PATTERN COMPRISING AN AQUEOUS COMPOSITION CONSISTING ESSENTIALLY OF COLLOIDAL GRAPHITE, A FLOUR OF A CERAMIC MAERIAL AND THE BALANCE WATER, AND IN WHICH THE COLLOIDAL GRAPHITE IS PRESENT IN AN AMOUNT WITHIN THE RANGE OF 0.5 TO 5 PERCENT BY WEIGHT OF THE DIP COAT COMPOSITION.
Claim 2
Dependent Claim
75 words
A DIP COAT COMPOSITION FOR USE IN FORMING A MOLD ABOUT A DISPOSABLE PATTERN FOR USE IN THE CASTING OF METALS, ALLOYS AND CERAMICS UPON REMOVAL OF THE DISPOSABLE PATTERN COMPRISING AN AQUEOUS COMPOSITION CONSISTING ESSENTIALLY OF COLLOIDAL GRAPHITE, A FLOUR OF A CERAMIC MAERIAL AND THE BALANCE WATER, AND IN WHICH THE COLLOIDAL GRAPHITE IS PRESENT IN AN AMOUNT WITHIN THE RANGE OF 0.5 TO 5 PERCENT BY WEIGHT OF THE DIP COAT COMPOSITION.
Claim 3
Dependent Claim
100 words
IN THE METHOD OF PRODUCING A MOLD ABOUT A DISPOSABLE PATTERN FOR USE IN PRECISION CASTING PROCESSES, THE STEPS OF WETTING THE SURFACE OF THE PATTERN WITH AN AQUEOUS DIP COAT COMPOSITION CONSISTING ESSENTIALLY OF COLLOIDAL GRAPHITE, CERAMIC FLOUR AND WATER, COVERING THE SURFACES OF THE PATTERN WHILE WET WITH THE DIP COAT COMPOSITION WITH A CERAMIC STUCCO, REPEATING THE CYCLE OF WETTING WITH THE DIP COAT COMPOSITION AND STUCCOING UNTIL A MOLD OF THE DESIRED WALL THICKNESS AND STRENGTH HAS BEEN BUILT UP ABOUT THE DISPOSABLE PATTERN, AND IN WHICH THE COLLOIDAL GRAPHITE IS PRESENT IN COMBINATION WITH THE
Claim 4
Dependent Claim
100 words
IN THE METHOD OF PRODUCING A MOLD ABOUT A DISPOSABLE PATTERN FOR USE IN PRECISION CASTING PROCESSES, THE STEPS OF WETTING THE SURFACE OF THE PATTERN WITH AN AQUEOUS DIP COAT COMPOSITION CONSISTING ESSENTIALLY OF COLLOIDAL GRAPHITE, CERAMIC FLOUR AND WATER, COVERING THE SURFACES OF THE PATTERN WHILE WET WITH THE DIP COAT COMPOSITION WITH A CERAMIC STUCCO, REPEATING THE CYCLE OF WETTING WITH THE DIP COAT COMPOSITION AND STUCCOING UNTIL A MOLD OF THE DESIRED WALL THICKNESS AND STRENGTH HAS BEEN BUILT UP ABOUT THE DISPOSABLE PATTERN, AND IN WHICH THE COLLOIDAL GRAPHITE IS PRESENT IN COMBINATION WITH THE
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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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |