US3684004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated graphite mold
Assignee: Individual
•
Filing: 1970-11-18
•
Granted: 1972-08-15
•
Expires: 1990-11-18
Abstract
Abstract A coating for the casting surfaces of a generally circular graphite mold, the coating thickness varying inversely as the distance from the centerline of the mold.
Inventors
- 👤 Andrew G Germain
- 👤 William G Dressel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:25
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/06; B22C9/061; B22C23/00; B22C23/02; B22C9/22; B22C9/28; B22D; B22D15/00; B22D15/005
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
A generally circular mold including a graphite cope and a graphite drag and having an ingate aligned with the axis of the mold, the entire casting surface of the cope and drag having a sprayed coating thereon applied as a slurry of water and a refractory and having a final thickness which varies inversely as the distance from the center of the mold, the thickness at the radially inner portion of the mold being in the range of about 0.024 inch to 0.036 inch and the thickness at the radially outer portion of the mold being in the range of about 0.003 inch to 0.007 inch.
Claim 2
Dependent Claim
106 words
A generally circular mold including a graphite cope and a graphite drag and having an ingate aligned with the axis of the mold, the entire casting surface of the cope and drag having a sprayed coating thereon applied as a slurry of water and a refractory and having a final thickness which varies inversely as the distance from the center of the mold, the thickness at the radially inner portion of the mold being in the range of about 0.024 inch to 0.036 inch and the thickness at the radially outer portion of the mold being in the range of about 0.003 inch to 0.007 inch.
Claim 3
Dependent Claim
25 words
A mold according to claim 1 wherein the mold coating material is a finely ground refractory taken from the group including quartz, zircon and cristobalite.
References Cited (Backward Citations)
US3116524A
Cited
US3515201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |