US3241200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision mold and method of fabrication
Assignee: Howmet Turbine Components Corp
•
Filing: 1963-09-20
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Granted: 1966-03-22
•
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
2026-10-29 01:39
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A DIP COAT COMPOSITION FOR USE IN FORMING A MOLD ABOUT A DISPOSABLE PATTERN AND FROM WHICH THE PATTERN IS REMOVED FOR USE OF THE MOLD IN PRECISION CASTING COMPRISING AN AQUEOUS COMPOSITION CONSISTING ESSENTIALLY OF GRAPHITE IN THE FORM OF A GRAPHITE FLOUR AND GRAPHITE IN THE FORM OF COLLOIDAL GRAPHITE WITH THE COLLOIDAL GRAPHITE COMPRISING FROM 1.5 TO 10 PERCENT BY WEIGHT OF THE GRAPHITE SOLIDS, AN EMULSIFYING AGENT PRESENT IN AN AMOUNT WITHIN THE RANG OF 0.01 TO 0.5 PERCENT BY WEIGHT OF THE COMPOSITION, AND THE BALANCE WATER.
Claim 2
Dependent Claim
111 words
IN THE METHOD OF PRODUCING A MOLD ABOUT A DISPOSABLE PATTERN WHICH IS REMOVED TO DEFINE THE MOLD CAVITY, THE STEPS OF WETTING THE SURFACE OF THE PATTERN WITH AN AQUEOUS DIP COAT COMPOSITION CONSISTING ESSENTIALLY OF THE COMBINATION OF GRAPHITE FLOUR, COLLOIDAL GRAPHITE, AND WATER, WITH THE COLLOIDAL GRAPHITE BEING PRESENT IN AN AMOUNT WITHIN THE RANGE OF 1.5 TO 10 PERCENT BY WEIGHT OF THE GRAPHITE SOLID, COVERING THE SURFACE OF THE PATTERN WHILE WET WITH THE DIP COAT COMPOSITION WITH A GRAPHITE STUCCO, REPEATING THE CYCLE OF OPERATIONS A NUMBER OF TIMES UNITL A MOLD OF THE DESIRED WALL THICKNESS AND STRENGTH IS BUILT UP ABOUT THE PATTERN.
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |