US3321005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making shell molds for casting reactive metals
Assignee: Howmet Turbine Components Corp
•
Filing: 1965-04-19
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Granted: 1967-05-23
•
Expires: 1985-04-19
Abstract
No abstract record available.
Inventors
- 👤 Nick G Lirones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:07
CPC Classifications
B; B22; B22C; B22C3/00; B22C1/00; B22C1/16; B22C1/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN THE METHOD OF PRODUCING A MOLD FOR USE IN CASTING SHAPED PRODUCTS OF REFRACTORY METALS, HEAVY REACTIVE METALS, METALS OF GROUP IV-B OF THE PERIODIC SYSTEM, AND ALLOYS THEREOF IN WHICH THE MOLD IS FORMED OF A COMPOSITE OF A DIP COAT COMPOSITION THE SOLIDS OF WHICH CONSIST ESSENTIALLY OF A CERAMIC FLOUR AND A CERAMIC BINDER AND A STUCCO OF CERAMIC PARTICLES, THE STEPS OF IMPREGNATING THE MOLD WITH A DILUTE FLUID COMPOSITION CONTAINING AN ORGANIC COMPOUND WHICH IS EASILY THERMALLY DECOMPOSABLE TO A STABLE CARBONACEOUS DECOMPOSITION PRODUCT, FIRING THE IMPREGNATED MOLD IN A NON-OXIDIZING ATMOSPHERE TO A TEMPERATURE ABOVE THE THERMAL DECOMPOSITION TEMPERATURE FOR THE ORGANIC MATERIAL THERMALLY TO DECOMPOSE THE ORGANIC MATERIAL IN SITU IN THE IMPREGNATED MOLD.
Claim 2
Dependent Claim
122 words
IN THE METHOD OF PRODUCING A MOLD FOR USE IN CASTING SHAPED PRODUCTS OF REFRACTORY METALS, HEAVY REACTIVE METALS, METALS OF GROUP IV-B OF THE PERIODIC SYSTEM, AND ALLOYS THEREOF IN WHICH THE MOLD IS FORMED OF A COMPOSITE OF A DIP COAT COMPOSITION THE SOLIDS OF WHICH CONSIST ESSENTIALLY OF A CERAMIC FLOUR AND A CERAMIC BINDER AND A STUCCO OF CERAMIC PARTICLES, THE STEPS OF IMPREGNATING THE MOLD WITH A DILUTE FLUID COMPOSITION CONTAINING AN ORGANIC COMPOUND WHICH IS EASILY THERMALLY DECOMPOSABLE TO A STABLE CARBONACEOUS DECOMPOSITION PRODUCT, FIRING THE IMPREGNATED MOLD IN A NON-OXIDIZING ATMOSPHERE TO A TEMPERATURE ABOVE THE THERMAL DECOMPOSITION TEMPERATURE FOR THE ORGANIC MATERIAL THERMALLY TO DECOMPOSE THE ORGANIC MATERIAL IN SITU IN THE IMPREGNATED MOLD.
References Cited (Backward Citations)
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Cited
US2886869A
Cited
US2991267A
Cited
US2961751A
Cited
US3042541A
Cited
US3005244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |