Patent US2500209A successfully refreshed from Google Patents.
US2500209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of shaped carbon articles
Assignee: GREAT LAKES CARBON Corp
•
Filing: 1946-07-11
•
Granted: 1950-03-14
•
Expires: 1966-07-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick L Shea
- 👤 Leslie H Juel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:56
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PROCESS OF FORMING SHAPED CARBON ARTICLES WHICH COMPRISES MIXING PARTICLES OF COKE WITH A HYDROCARBONACEIOUS BINDER, ADDING TO THE RESULTANT MIXTURE, AS A LUBRICANT, A POLAR AROMATIC COMPOUND POTENTIALLY REACTIVE WITH SAID BINDER AT A TEMPERATURE ABOVE 175*C. TO DEPOSIT CARBON IN THE ARTICLE, AND MISCIBLE IN SAID BINDER BELOW 175*C., THE PROPORTION OF SAID COMPOUND BEING AT LEAST 2 PARTS BY WEIGHT PER 100 PARTS OF COKE, MIXING THE RESULTANT COMPOSITION AT A TEMPERATURE BELOW 175*C. FOR A PERIOD OF TIME SUFFICIENT TO DEPOSIT A FILM OF SAID LUBRICANT ON SAID PARTICLES WITHOUT SUBSTANTIAL ABSORPTION OF SAID LUBRICANT BY THE BINDER, FORMING THE RESULTING MIXTURE UNDER PRESSUR INTO A SHAPED ARTICLE AT A TEMPERATURE BELOW 175*C. AND THEN HEATING SAID ARTICLE AT A TEMPERATURE ABOVE 175*C.
Claim 2
Dependent Claim
128 words
A PROCESS OF FORMING SHAPED CARBON ARTICLES WHICH COMPRISES MIXING PARTICLES OF COKE WITH A HYDROCARBONACEIOUS BINDER, ADDING TO THE RESULTANT MIXTURE, AS A LUBRICANT, A POLAR AROMATIC COMPOUND POTENTIALLY REACTIVE WITH SAID BINDER AT A TEMPERATURE ABOVE 175*C. TO DEPOSIT CARBON IN THE ARTICLE, AND MISCIBLE IN SAID BINDER BELOW 175*C., THE PROPORTION OF SAID COMPOUND BEING AT LEAST 2 PARTS BY WEIGHT PER 100 PARTS OF COKE, MIXING THE RESULTANT COMPOSITION AT A TEMPERATURE BELOW 175*C. FOR A PERIOD OF TIME SUFFICIENT TO DEPOSIT A FILM OF SAID LUBRICANT ON SAID PARTICLES WITHOUT SUBSTANTIAL ABSORPTION OF SAID LUBRICANT BY THE BINDER, FORMING THE RESULTING MIXTURE UNDER PRESSUR INTO A SHAPED ARTICLE AT A TEMPERATURE BELOW 175*C. AND THEN HEATING SAID ARTICLE AT A TEMPERATURE ABOVE 175*C.
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) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |