Patent GB577795A successfully refreshed from Google Patents.
US2587523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for forming a glaze on carbon
Assignee: Individual
•
Filing: 1948-05-06
•
Granted: 1952-02-26
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Expires: 1968-05-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles H Prescott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:44
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A PROCESS FOR FORMING AN ADHERENT SURFACE GLAZE OF REFRACTORY OXIDE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF THORIUM, HAFNIUM, AND ZIRCONIUM BONDED DIRECTLY TO THE SURFACE OF A CARBON STRUCTURE, THE STEPS COMPRISING COATING SAID CARBON STRUCTURE WITH A COMPOUND OF SAID ELEMENT SELECTED FROM THE GROUP CONSISTING OF SILICATES, BORATES AND PHOSPHATES DISPERSED IN A CELLULOSE NITRATE VEHICLE, AND THEREAFTER HEATING THE COATED CARBON STRUCTURE TO A TEMPERATURE IN THE RANGE OF 2350* K. TO 2500* K.IN THE PRESENCE OF AN ATMOSPHERE OF CARBON MONOXIDE GAS HAVING A PRESSURE SLIGHTLY IN EXCESS OF THE EQUILIBRIUM PRESSURE THEREOF IN THE REACTION
Claim 2
Dependent Claim
105 words
IN A PROCESS FOR FORMING AN ADHERENT SURFACE GLAZE OF REFRACTORY OXIDE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF THORIUM, HAFNIUM, AND ZIRCONIUM BONDED DIRECTLY TO THE SURFACE OF A CARBON STRUCTURE, THE STEPS COMPRISING COATING SAID CARBON STRUCTURE WITH A COMPOUND OF SAID ELEMENT SELECTED FROM THE GROUP CONSISTING OF SILICATES, BORATES AND PHOSPHATES DISPERSED IN A CELLULOSE NITRATE VEHICLE, AND THEREAFTER HEATING THE COATED CARBON STRUCTURE TO A TEMPERATURE IN THE RANGE OF 2350* K. TO 2500* K.IN THE PRESENCE OF AN ATMOSPHERE OF CARBON MONOXIDE GAS HAVING A PRESSURE SLIGHTLY IN EXCESS OF THE EQUILIBRIUM PRESSURE THEREOF IN THE REACTION
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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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |