US4659749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting mixture comprising china clay, silica and an styrene-acrylic copolymer latex
Assignee: Individual
•
Filing: 1985-08-19
•
Granted: 1987-04-21
•
Expires: 2005-08-19
Abstract
Abstract A casting mixture comprises a ceramic slip and a styrene/acrylic copolymer latex emulsion which provides unique properties and does not require firing.
Inventors
- 👤 Marshall E. Sornik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:41
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/346; C04; C04B; C04B26/00; C04B26/02; C04B26/04; C04B26/06; C08K3/36
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
63 words
A casting mixture for forming ceramic articles comrising a ceramic slip, said slip being formed with from 30% to 60% by weight china clay, from 5% to 10% by weight silica, and from 30% to 60% by weight water; and in combination therewith an emulsion of a styrene acrylic copolymer latex, said emulsion comprising from 3% to 35% of the mixture by volume.
Claim 2
Dependent Claim
63 words
A casting mixture for forming ceramic articles comrising a ceramic slip, said slip being formed with from 30% to 60% by weight china clay, from 5% to 10% by weight silica, and from 30% to 60% by weight water; and in combination therewith an emulsion of a styrene acrylic copolymer latex, said emulsion comprising from 3% to 35% of the mixture by volume.
Claim 3
Dependent Claim
23 words
The casting mixture of claim 1 in which the percentage of said emulsion is from 15% to 25% of the mixture by volume.
Claim 4
Dependent Claim
18 words
The casting mixture of claim 2 which further includes a bactericide and a dispersed pigment dye for latex.
Claim 5
Dependent Claim
24 words
The casting mixture of claim 1 wherein said ceramic slip comprises approximately 55% china clay, approximately 5% silica, and approximately 40% water, by weight.
References Cited (Backward Citations)
US3956217A
Cited
US4073999A
Cited
US4409276A
Cited
JPS6083985A
Cited
JPS60108480A
Cited
JPS60185869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |