US3942293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal oxide coated refractory brick
Assignee: PPG Industries Inc
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Filing: 1973-03-15
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Granted: 1976-03-09
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Expires: 1993-03-15
Abstract
Abstract Refractory brick that is treated with refractory metal oxide powder, e.g., titanium oxide, is used as a reactor lining. Joints between a dry assembly of refractory brick are filled with refractory metal oxide powder.
Inventors
- 👤 Richard S. Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:41
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/66; B; B01; B01J; B01J19/00; B01J19/02; B01J8/00; B01J8/18; B01J8/1872; B65; B65D; B65D85/00; B65D85/70; B65D85/84; C04B35/01; C04B37/00; C04B37/003; C04B37/005; B01J2219/00; B01J2219/02; B01J2219/0204; B01J2219/0236; B01J2219/024; C04B2111/00; C04B2111/00474; C04B2111/00663; C04B2111/00672; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3231; C04B2235/3232; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5436; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/062; C04B2237/064; C04B2237/068; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/343; C04B2237/345; C04B2237/346; C04B2237/348; C04B2237/36; C04B2237/365; C04B2237/50; C04B2237/52; C04B2237/61; C04B2237/62; C04B2237/70; C04B2237/708; C04B2237/76
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
57 words
A dry assembly of refractory bricks wherein joints between individual bricks are grouted with material consisting essentially of substantially dry, finely divided, free flowing refractory metal oxide powder having a melting point greater than the temperature to which the refractory brick is exposed, the exposed faces of said grouting consisting essentially of said refractory metal oxide powder.
Claim 2
Dependent Claim
57 words
A dry assembly of refractory bricks wherein joints between individual bricks are grouted with material consisting essentially of substantially dry, finely divided, free flowing refractory metal oxide powder having a melting point greater than the temperature to which the refractory brick is exposed, the exposed faces of said grouting consisting essentially of said refractory metal oxide powder.
Claim 3
Dependent Claim
29 words
An assembly according to claim 1 wherein the refractory metal oxide is selected from the group consisting of the oxides of silicon, titanium, zirconium, magnesium, aluminum and mixtures thereof.
Claim 4
Dependent Claim
14 words
An assembly according to claim 1 wherein the refractory metal oxide is titanium dioxide.
Claim 5
Dependent Claim
14 words
An assembly according to claim 3 wherein the titanium dioxide is pigmentary titanium dioxide.
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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |