US3102047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for production of low permeability carbon
Assignee: The General Electric Company PLC
•
Filing: 1959-06-16
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Granted: 1963-08-27
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Expires: 1979-06-16
Abstract
No abstract record available.
Inventors
- 👤 Rivington Herbert Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:40
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/521; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR THE PRODUCTION OF LOW PERMEABILITY CARBON FROM CARBON OF SUBSTANTIALLY HIGHER PERMEABILITY COMPRRISING IMPREGNATING OF CARBON WHOSE PERMEABILITY IS TO BE REDUCED WITH A LIQUID CONSISTING ESSENTIALLY OF UP FIVE PERCENT OF FURFURYL ALCOHOL, UP TO TEN PERCENT OF A CELLULOSE PLASTIC AND THE REMAINDER FURFURAL AND THE WHOLE OF WHICH IS CARBONIZABLE POLYMERIZING THE FURFURAL BY HEATING THE IMPREGNATED CARBON TO A TEMPERATURE IN THE RANGE OF 275*C. TO 310*C. OVER A PERIOD OF FOUR HOURS, UNDER A PRESSURE OF AT LEAST 800 POUNDS PER SQUARE INCH AND IN THE ABSENCE OF A CATALYST, AND HEATING THE THUS IMPREGNATED CARBON TO A SUFFICIENTLY HIGH TEMPERATURE TO EFFECT CARBONIZATION OF THE IMPREGNANT.
Claim 2
Dependent Claim
115 words
A PROCESS FOR THE PRODUCTION OF LOW PERMEABILITY CARBON FROM CARBON OF SUBSTANTIALLY HIGHER PERMEABILITY COMPRRISING IMPREGNATING OF CARBON WHOSE PERMEABILITY IS TO BE REDUCED WITH A LIQUID CONSISTING ESSENTIALLY OF UP FIVE PERCENT OF FURFURYL ALCOHOL, UP TO TEN PERCENT OF A CELLULOSE PLASTIC AND THE REMAINDER FURFURAL AND THE WHOLE OF WHICH IS CARBONIZABLE POLYMERIZING THE FURFURAL BY HEATING THE IMPREGNATED CARBON TO A TEMPERATURE IN THE RANGE OF 275*C. TO 310*C. OVER A PERIOD OF FOUR HOURS, UNDER A PRESSURE OF AT LEAST 800 POUNDS PER SQUARE INCH AND IN THE ABSENCE OF A CATALYST, AND HEATING THE THUS IMPREGNATED CARBON TO A SUFFICIENTLY HIGH TEMPERATURE TO EFFECT CARBONIZATION OF THE IMPREGNANT.
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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) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |