Patent US3109712A successfully refreshed from Google Patents.
US3109712A
Expired / Lapsed
US
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Bodies and shapes of carbonaceous materials and processes for their production
Assignee: GE Healthcare UK Ltd
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Filing: 1961-01-09
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Granted: 1963-11-05
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Expires: 1981-01-09
Abstract
No abstract record available.
Inventors
- 👤 Redfern Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:08
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/524; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR THE PRODUCTION OF HARD, LUSTROUS, SUBSTANTIALLY IMPERMEABLE, VITREOUS, CHEMICALLY-RESISTANT BODIES CONSISTING SUBSTANTIALLY WHOLLY OF CARBON FROM PRESHAPED RESINOUS BODIES COMPRISING CURED PHENOL ALDEHYDE, WHEREIN THE RESINOUS BODIES ARE HEATED AT A GRADIENT OF 5*C. PER HOUR UNTIL A TEMPERATURE OF 600*C. IS REACHED, THE HEATING GRADIENT IS THEN INCREASED TO 10*C. PER HOUR UNTIL A TEMPERATURE OF ''825*C. IS REACHED, THE HEATING GRADIENT AGAIN INCREASED TO 20*C. PER HOUR UNTIL A TEMPERATURE OF AT LEAST 1400*C. IS REACHED AND THIS TEMPERATURE MAINTAINED FOR 24 HOURS AFTER WHICH THE PRODUCT OBTAINED IS COOLED TO ROOM TEMPERATURE AT A GRADIENT OF 20*C. PER HOUR.
Claim 2
Dependent Claim
105 words
A PROCESS FOR THE PRODUCTION OF HARD, LUSTROUS, SUBSTANTIALLY IMPERMEABLE, VITREOUS, CHEMICALLY-RESISTANT BODIES CONSISTING SUBSTANTIALLY WHOLLY OF CARBON FROM PRESHAPED RESINOUS BODIES COMPRISING CURED PHENOL ALDEHYDE, WHEREIN THE RESINOUS BODIES ARE HEATED AT A GRADIENT OF 5*C. PER HOUR UNTIL A TEMPERATURE OF 600*C. IS REACHED, THE HEATING GRADIENT IS THEN INCREASED TO 10*C. PER HOUR UNTIL A TEMPERATURE OF ''825*C. IS REACHED, THE HEATING GRADIENT AGAIN INCREASED TO 20*C. PER HOUR UNTIL A TEMPERATURE OF AT LEAST 1400*C. IS REACHED AND THIS TEMPERATURE MAINTAINED FOR 24 HOURS AFTER WHICH THE PRODUCT OBTAINED IS COOLED TO ROOM TEMPERATURE AT A GRADIENT OF 20*C. PER HOUR.
References Cited (Backward Citations)
US1156509A
Cited
GB329652A
Cited
US2609256A
Cited
US2697028A
Cited
US2758940A
Cited
US2765354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |