US3170812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of vitrifying ceramic coatings
Assignee: Individual
•
Filing: 1953-09-30
•
Granted: 1965-02-23
•
Expires: 1973-09-30
Abstract
No abstract record available.
Inventors
- 👤 Murray A Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:53
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5022; C04B41/80; C04B41/81; C04B41/85; C04B41/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
AN IMPROVED METHOD OF PROVIDING A PROTECTIVE COATING ON A BERYLLIUM CARBIDE-CARBON BODY, WHICH COMPRISES APPLYING ON SAID BODY A CERAMIC COATING COMPRISING APPROXIMATELY 1.5-3.5 MOLES OF AN ACIDIC OXIDE, APPROXIMATELY 0.1-0.6 MOLE OF AN AMPHOTERIC OXIDE AND APPROXIMATELY 0.8-2.4 MOLES OF A BASIC OXIDE, WHEREIN THE MAJOR ACIDIC OXIDE COMPONENT IS SIO2, THE MAJOR AMPHOTERIC OXIDE COMPONENT IS AL2O3 AND THE MAJOR BASIC OXIDE COMPONENT IS CAO, HEATING THE RESULTING COATED BODY BY RADIANT HEATING MEANS IN A NON-OXIDIZING ATMOSPHERE UNTIL A PORTION OF SAID COATING IS MELTED, SAID MELTED PORTION BEING SUFFICIENT TO COVER THE SURFACE OF SAID BODY AND SUBSEQUENTLY HEATING THE RESULTING COATED BODY BY INDUCTION HEATING MEANS IN A NON-OXIDIZING ATMOSPHERE AT A SUFFICIENTLY HIGHER TEMPERATURE TO EFFECT COMPLETE VITRIFICATION.
Claim 2
Dependent Claim
125 words
AN IMPROVED METHOD OF PROVIDING A PROTECTIVE COATING ON A BERYLLIUM CARBIDE-CARBON BODY, WHICH COMPRISES APPLYING ON SAID BODY A CERAMIC COATING COMPRISING APPROXIMATELY 1.5-3.5 MOLES OF AN ACIDIC OXIDE, APPROXIMATELY 0.1-0.6 MOLE OF AN AMPHOTERIC OXIDE AND APPROXIMATELY 0.8-2.4 MOLES OF A BASIC OXIDE, WHEREIN THE MAJOR ACIDIC OXIDE COMPONENT IS SIO2, THE MAJOR AMPHOTERIC OXIDE COMPONENT IS AL2O3 AND THE MAJOR BASIC OXIDE COMPONENT IS CAO, HEATING THE RESULTING COATED BODY BY RADIANT HEATING MEANS IN A NON-OXIDIZING ATMOSPHERE UNTIL A PORTION OF SAID COATING IS MELTED, SAID MELTED PORTION BEING SUFFICIENT TO COVER THE SURFACE OF SAID BODY AND SUBSEQUENTLY HEATING THE RESULTING COATED BODY BY INDUCTION HEATING MEANS IN A NON-OXIDIZING ATMOSPHERE AT A SUFFICIENTLY HIGHER TEMPERATURE TO EFFECT COMPLETE VITRIFICATION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |