US5034448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip composition for whiteware articles
Assignee: Huntsman Ethyleneamines Ltd
•
Filing: 1990-03-28
•
Granted: 1991-07-23
•
Expires: 2010-03-28
Abstract
Abstract A casting process for the preparation of whiteware ceramic articles employs a polyalkylene polyamine, such as tetraethylene pentamine, as an additive to increase the casting rate. The additive can be employed, e.g., in slip casting, vacuum casting and pressure casting. Optionally, the additive includes a binder such as a styrene butadiene latex in an amount effective to maintain the green strength of the articles prepared in the casting process.
Inventors
- 👤 Brian D. Koblinski
- 👤 Alan P. Croft
- 👤 Alfredo C. Tamez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:20
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/28; C04B33/24; C08; C08K; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
48 words
A slip composition comprising: (a) a slip medium; (b) a particulate material comprising ball clays and kaolin clays; and (c) an amount of a polyalkylene polyamine having an average molecular weight of less than about 1,000 effective to increase the cast rate of casting processes using the slip.
Claim 2
Dependent Claim
48 words
A slip composition comprising: (a) a slip medium; (b) a particulate material comprising ball clays and kaolin clays; and (c) an amount of a polyalkylene polyamine having an average molecular weight of less than about 1,000 effective to increase the cast rate of casting processes using the slip.
Claim 3
Dependent Claim
25 words
The composition of claim 1 further comprising an amount of a binder effective to maintain the green strength of articles prepared from the slip composition.
Claim 4
Dependent Claim
23 words
The slip composition of claim 1 wherein the amount of polyamine is from about 0.0001 to about 1 weight percent of the slip.
Claim 5
Dependent Claim
12 words
The slip composition of claim 3 wherein the polyalkylene polyamine is tetraethylenepentamine.
Claim 6
Dependent Claim
14 words
The slip of claim 2 wherein a styrenebutadiene latex is employed as the binder.
Claim 7
Dependent Claim
19 words
The slip composition of claim 5 wherein the polyalkylene polyamine is tetraethylenepentamine and the binder is a butadiene latex.
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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) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |