Patent US3194717A successfully refreshed from Google Patents.
US2637072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of carbon molded bodies
Assignee: CD Patents Ltd
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Filing: 1949-05-27
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Granted: 1953-05-05
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Expires: 1969-05-27
Abstract
No abstract record available.
Inventors
- 👤 Greaves Charles Desmond
- 👤 Parker William Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
THE PROCESS FOR THE MANUFACTURE OF CARBON MOULDED BODIES IN WIHCH PROCESS POWDERED COAL CONTAINING FROM 10 TO 15 PER CENT OF VOLATILE MATTER ON A DRY ASH-FREE BASIS IS INTIMATELY MIXED AND AGITATED AT A TEMPERATURE BETWEEN 100* C. AND 150* C. WITH A HYDROCARBON-CONTAINING PLASTICIZING AGENT WHICH IS PLASTIC AT THAT TEMPERATURE, THE PROPORTIONS BY WEIGHT BEING ABOUT 4 PARTS OF COAL TO 1 PART OF PLASTICIZING AGENT, THE RESULTING MIXTURE IN A PLASTIC CONDITION IS MOULDED TO THE DESIRED SHAPE AT ABOUT THE SAME TEMPERATURE AND UNDER A PRESSURE OF THE ORDER OF TWO TONS PER SUQARE INCH AND THE MOULDED SHAPE IS THEN FIRED UNDER NON-OXIDISING CONDITIONS AT A RATE OF TEMPERATURE RISE SUCH AS TO PRODUCE AN UNDISTORTED PRODUCT FREE FROM CRACKS AND HAVING NO CELLULAR STRUCTURE VISIBLE TO THE NAKED EYE, THE FIRED PRODUCT BEING ALLOWED TO COOL IN A NON-OXIDISING ATMOSPHERE.
Claim 2
Dependent Claim
148 words
THE PROCESS FOR THE MANUFACTURE OF CARBON MOULDED BODIES IN WIHCH PROCESS POWDERED COAL CONTAINING FROM 10 TO 15 PER CENT OF VOLATILE MATTER ON A DRY ASH-FREE BASIS IS INTIMATELY MIXED AND AGITATED AT A TEMPERATURE BETWEEN 100* C. AND 150* C. WITH A HYDROCARBON-CONTAINING PLASTICIZING AGENT WHICH IS PLASTIC AT THAT TEMPERATURE, THE PROPORTIONS BY WEIGHT BEING ABOUT 4 PARTS OF COAL TO 1 PART OF PLASTICIZING AGENT, THE RESULTING MIXTURE IN A PLASTIC CONDITION IS MOULDED TO THE DESIRED SHAPE AT ABOUT THE SAME TEMPERATURE AND UNDER A PRESSURE OF THE ORDER OF TWO TONS PER SUQARE INCH AND THE MOULDED SHAPE IS THEN FIRED UNDER NON-OXIDISING CONDITIONS AT A RATE OF TEMPERATURE RISE SUCH AS TO PRODUCE AN UNDISTORTED PRODUCT FREE FROM CRACKS AND HAVING NO CELLULAR STRUCTURE VISIBLE TO THE NAKED EYE, THE FIRED PRODUCT BEING ALLOWED TO COOL IN A NON-OXIDISING ATMOSPHERE.
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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |