Patent US5188989A successfully refreshed from Google Patents.
US5188989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating mix to prevent oxidation of carbon substrates
Assignee: Indresco Inc
•
Filing: 1987-12-01
•
Granted: 1993-02-23
•
Expires: 2007-12-01
Abstract
Abstract An oxidation-resistant carbon-containing refractory shape having on the surface thereof exposed to oxidation an oxidation-resistant glaze coating, said glaze coating consisting essentially of the reaction product of a zinc borosilicate frit and a clay; and the method of forming said coating on a refractory shape comprising applying to at least a portion of the shape an aqueous suspension of a fluxed mix consisting essentially of a zinc borosilicate and a clay, drying said coating, and firing said coated refractory shape at a temperature and for a time sufficient to cause the borosilicate and clay in said mix to react and form a substantially uniform glaze coating.
Inventors
- 👤 Howard M. Winkelbauer
- 👤 Eugene T. Rushe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:53
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/14; C03C8/02; C03C8/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
28 words
A fluxed mix for forming an oxidation-resistant glaze coating on a carbon-containing refractory shape consisting essentially of a zinc borosilicate frit, a clay, and a water-soluble acrylic resin.
Claim 2
Dependent Claim
28 words
A fluxed mix for forming an oxidation-resistant glaze coating on a carbon-containing refractory shape consisting essentially of a zinc borosilicate frit, a clay, and a water-soluble acrylic resin.
Claim 3
Dependent Claim
43 words
The fluxed mix of claim 1 containing about 90% by weight zinc borosilicate and correspondingly about 10% by weight of clay, and, for each 100% by weight of said borosilicate and clay, about 4 to 5% by weight of a water-soluble acrylic resin.
Claim 4
Dependent Claim
14 words
The fluxed mix of claim 1 wherein said clay is a crude ball clay.
Claim 5
Dependent Claim
14 words
The fluxed mix of claim 2 wherein said clay is a crude ball clay.
Claim 6
Dependent Claim
23 words
The fluxed mix of claim 1, 2, 3, or 4 wherein said borosilicate and clay are in the form of -325 mesh powders.
Claim 7
Dependent Claim
23 words
The fluxed mix of claim 1, 2, 3, or 4 wherein said fluxed mix is in the form of a suspension in water.
References Cited (Backward Citations)
US2063252A
Cited
US2269176A
Cited
US2527884A
Cited
US2786782A
Cited
US3939295A
Cited
US4088502A
Cited
GB1593351A
Cited
US4361654A
Cited
US4340645A
Cited
US4540675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-23 | 1996-08-24 | 1997-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-23 | 2000-08-24 | 2001-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-23 | 2004-08-24 | 2005-02-23 | $7700.00 | Window Closed / Lapsed |