US3174872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation resistant carbon refractory articles
Assignee: Union Carbide Corp
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Filing: 1963-01-08
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Granted: 1965-03-23
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Expires: 1983-01-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Fisher
- 👤 Lester L Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:54
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08; H05B7/085; C; C04; C04B; C04B35/00; C04B35/515; C04B35/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
AN OXIDATION RESISTANT REFRACTORY ARTICLE COMPOSED OF A CARBONACEOUS MATERIAL AND CONTAINING UNIFORMALY DISTRIBUTED THROUGHOUT AND ON THE SURFACE THEREOF A PROTECTIVE GLASS-FORMING ADDITIVE WHICH WHEN BAKED WILL MECHANICALLY EXCLUDE OXYGEN FROM SAID SURFACE, SAID GLASS FORMING ADDITIVE COMPRISING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF BORON, MIXTURES OF BORIC OXIDE AND SILICON DIOXIDE; MIXTURES OF BORIC OXIDE AND TIN OXIDE; MIXTURES OF BORIC OXIDE AND TITANIUM DIOXIDE; MIXTURES OF BIROC OXIDE, SODIUM PHOSPHATE, AND CALCIUM PHOSPHATE; MIXTURE OF BORIC OXIDE, SODIUM PHOSPHATE AND ALUMINUM PHOSPHATE; AND MIXTURE OF BORIC OXIDE, SODIUM PHOSPHATE AND MAGNESIUM PHOSPHATE; WHEREIN THE WEIGHT OF SAID BORIC OXIDE IN SAID MIXTURES BEING FROM ON HALF TO NINETEEN TIMES THE WEIGHT OF THE OTHER CONSTITUENTS OF SAID MIXTURES; THE TOTAL AMOUNT OF SAID GLASSFORMING ADDITIVE RANGING FROM 6 TO 30 WEIGHT PERCENT OF SAID ARTICLE.
Claim 2
Dependent Claim
142 words
AN OXIDATION RESISTANT REFRACTORY ARTICLE COMPOSED OF A CARBONACEOUS MATERIAL AND CONTAINING UNIFORMALY DISTRIBUTED THROUGHOUT AND ON THE SURFACE THEREOF A PROTECTIVE GLASS-FORMING ADDITIVE WHICH WHEN BAKED WILL MECHANICALLY EXCLUDE OXYGEN FROM SAID SURFACE, SAID GLASS FORMING ADDITIVE COMPRISING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF BORON, MIXTURES OF BORIC OXIDE AND SILICON DIOXIDE; MIXTURES OF BORIC OXIDE AND TIN OXIDE; MIXTURES OF BORIC OXIDE AND TITANIUM DIOXIDE; MIXTURES OF BIROC OXIDE, SODIUM PHOSPHATE, AND CALCIUM PHOSPHATE; MIXTURE OF BORIC OXIDE, SODIUM PHOSPHATE AND ALUMINUM PHOSPHATE; AND MIXTURE OF BORIC OXIDE, SODIUM PHOSPHATE AND MAGNESIUM PHOSPHATE; WHEREIN THE WEIGHT OF SAID BORIC OXIDE IN SAID MIXTURES BEING FROM ON HALF TO NINETEEN TIMES THE WEIGHT OF THE OTHER CONSTITUENTS OF SAID MIXTURES; THE TOTAL AMOUNT OF SAID GLASSFORMING ADDITIVE RANGING FROM 6 TO 30 WEIGHT PERCENT OF SAID ARTICLE.
References Cited (Backward Citations)
US2422215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |