US4338272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip-casting system
Assignee: CENTRE D'INNOVATION INDUSTRIELLE MONTREAL
•
Filing: 1979-01-11
•
Granted: 1982-07-06
•
Expires: 1999-01-11
Abstract
Abstract A slip-casting system utilizing a ceramic powder for the mold. The system facilitates casting thin-walled and/or long objects without additives for demolding.
Inventors
- 👤 Arthur D. Pelton
- 👤 Michel Rivier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:40
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/26; B28B1/261; B28B1/262; B29; B29C; B29C41/00; B29C41/02; B29C41/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
107 words
A system for slip-casting, comprising: providing a powder of ceramic material, said powder having a particle size sufficiently small to provide shape retention upon compaction, and to retain suspended particles of a slip, and said powder being inert to the slip; shaping an compacting the powder to provide a mold cavity that conforms in shape to that of a desired casting; introducing a slip into said shaped and compacted powder mold cavity, retaining the slip for a time sufficient to form the desired thickness of the casting, and removing the remaining slip; allowing at least partial drying of the casting; and separating the casting from the powder.
Claim 2
Independent Claim
107 words
A system for slip-casting, comprising: providing a powder of ceramic material, said powder having a particle size sufficiently small to provide shape retention upon compaction, and to retain suspended particles of a slip, and said powder being inert to the slip; shaping an compacting the powder to provide a mold cavity that conforms in shape to that of a desired casting; introducing a slip into said shaped and compacted powder mold cavity, retaining the slip for a time sufficient to form the desired thickness of the casting, and removing the remaining slip; allowing at least partial drying of the casting; and separating the casting from the powder.
Claim 3
Dependent Claim
19 words
The system of claim 1 wherein the particle size of the powder ranges from 0.1 μm to 1000 μm.
Claim 4
Dependent Claim
19 words
The system of claim 2 wherein the particle size of the powder ranges from 1 μm to 50 μm.
Claim 5
Dependent Claim
12 words
The system of claim 1 wherein the powder is a metal oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |