Patent US3393085A successfully refreshed from Google Patents.
US3393085A
Expired / Lapsed
US
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Thermally stable carbon articles
Assignee: Union Carbide Corp
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Filing: 1962-07-06
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Granted: 1968-07-16
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Expires: 1982-07-06
Abstract
No abstract record available.
Inventors
- 👤 Ronald A Howard
- 👤 George C Tolley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:40
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/268; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A THERMALLY STABLE CARBON ARTICLE HAVING AN ESSENTIALLY ISOTROPIC COEFFICIENT OF THERMAL EXPANSION WHICH IS CHARACTERIZED BY BEING THERMALLY STABLE OVER THE TEMPERATURE RANGE OF FROM ABOUT 400*C. TO ABOUT 1000*C. COMPRISING BY WEIGHT FROM ABOUT 25 TO ABOUT 50 PERCENT FINE SPHERICAL GRAPHITE PARTICLES WITH THE REMAINDER BEING ESSENTIALLY A FILLER MATERIAL SELECTED FROM THE GROUP CONSISTING OF GRAPHITIZED CARBON FLOUR, GRAPHITIZED GILSONITE FLOUR AND MIXTURES THEREOF PLUS MINOR AMOUNTS OF BINDER SELECTED FROM THE GROUP CONSISTING OF GRAPHITIZED COAL TAR PITCH, GRAPHITIZED PETROLEUM PITCH AND MIXTURES THEREOF.
Claim 2
Dependent Claim
89 words
A THERMALLY STABLE CARBON ARTICLE HAVING AN ESSENTIALLY ISOTROPIC COEFFICIENT OF THERMAL EXPANSION WHICH IS CHARACTERIZED BY BEING THERMALLY STABLE OVER THE TEMPERATURE RANGE OF FROM ABOUT 400*C. TO ABOUT 1000*C. COMPRISING BY WEIGHT FROM ABOUT 25 TO ABOUT 50 PERCENT FINE SPHERICAL GRAPHITE PARTICLES WITH THE REMAINDER BEING ESSENTIALLY A FILLER MATERIAL SELECTED FROM THE GROUP CONSISTING OF GRAPHITIZED CARBON FLOUR, GRAPHITIZED GILSONITE FLOUR AND MIXTURES THEREOF PLUS MINOR AMOUNTS OF BINDER SELECTED FROM THE GROUP CONSISTING OF GRAPHITIZED COAL TAR PITCH, GRAPHITIZED PETROLEUM PITCH AND MIXTURES THEREOF.
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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) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |