Patent US3219466A successfully refreshed from Google Patents.
US3219466A
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Method of producing ceramic articles and the articles produced by this method
Assignee: GIBBONS (DUDLEY) Ltd
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Filing: 1962-03-19
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Granted: 1965-11-23
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Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Isherwood Thomas Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:49
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/65; C04B35/651
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A METHOD OF FORMING A CERAMIC ARTICLE COMPRISING (A) INTIMATELY MIXING PARTICLES OF AT LEAST ONE SOLID STATE OXYGEN CONTAINING COMPOUND SELECTED FROM A GROUP CONSISTING OF TITANIUM OXIDE, ALUMINUM OXIDE, IRON OXIDE, CHRONIUM OXIDE, MAGNESIUM OXIDE, AND CALCIUM OXIDE, (B) WITH PARTICLES OF A METAL SELECTED FROM A GROUP CONSISTING OF ALUMINUM AND MAGNESIUM, (C) COMPACTING THE MIXTURE TO FORM IT INOT THE DESIRED SHAPE OF THE ARTICLE, (D) SUPPLYING HEAT TO THE MIXTURE AT A SUFFICIENTLY HIGH RATE TO INITIATE AN AUTOTHERMIC REACTION BETWEEN THE SAID METAL AND SAID SELECTED OXYGEN CONTAINING COMPOUND TO FORM NON-STOICHIOMETRIC COMPOUNDS, (E) AND SUBJECTING THE ARTICLE TO AN FTER-TREATMENT UPON COMPLETION OF THE SAID REACTION COMPRISING HEATING THE RESULTANT NON-STOICHIOMETRIC COMPOUNDS IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE AT LEAST APPROXIMATELY 1000*C. FOR A PERIOD OF TIME AT LEAST APPROXIMATELY 10 HOURS TO EFFECT MODIFICATION OF THE DEGREE OF NON-STOICHIOMETRY IN AN OUTER LAYER OF THE ARTICLE RELATIVE TO THAT EXISTING IN THE INTERIOR OF THE ARTICLE.
Claim 2
Independent Claim
165 words
A METHOD OF FORMING A CERAMIC ARTICLE COMPRISING (A) INTIMATELY MIXING PARTICLES OF AT LEAST ONE SOLID STATE OXYGEN CONTAINING COMPOUND SELECTED FROM A GROUP CONSISTING OF TITANIUM OXIDE, ALUMINUM OXIDE, IRON OXIDE, CHRONIUM OXIDE, MAGNESIUM OXIDE, AND CALCIUM OXIDE, (B) WITH PARTICLES OF A METAL SELECTED FROM A GROUP CONSISTING OF ALUMINUM AND MAGNESIUM, (C) COMPACTING THE MIXTURE TO FORM IT INOT THE DESIRED SHAPE OF THE ARTICLE, (D) SUPPLYING HEAT TO THE MIXTURE AT A SUFFICIENTLY HIGH RATE TO INITIATE AN AUTOTHERMIC REACTION BETWEEN THE SAID METAL AND SAID SELECTED OXYGEN CONTAINING COMPOUND TO FORM NON-STOICHIOMETRIC COMPOUNDS, (E) AND SUBJECTING THE ARTICLE TO AN FTER-TREATMENT UPON COMPLETION OF THE SAID REACTION COMPRISING HEATING THE RESULTANT NON-STOICHIOMETRIC COMPOUNDS IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE AT LEAST APPROXIMATELY 1000*C. FOR A PERIOD OF TIME AT LEAST APPROXIMATELY 10 HOURS TO EFFECT MODIFICATION OF THE DEGREE OF NON-STOICHIOMETRY IN AN OUTER LAYER OF THE ARTICLE RELATIVE TO THAT EXISTING IN THE INTERIOR OF THE ARTICLE.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |