US3399969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposition of massive pyrolytic carbon
Assignee: Gulf General Atomic Inc
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Filing: 1966-02-10
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Granted: 1968-09-03
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Expires: 1986-02-10
Abstract
No abstract record available.
Inventors
- 👤 Jack C Bokros
- 👤 Chin Jack
- 👤 Alan S Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:41
CPC Classifications
C; C01; C01B; C01B32/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS FOR MAKING MASSIVE PYROLYTIC CARBON, WHICH PROCESS COMPRISES ESTABLISHING A BED OF PARTICLES IN A CHAMBER IN ASSOCIATION WITH A MANDREL IN THE CHAMBER, FLOWING A VAPORUS CARBON-CONTAINING SUBSTANCE THROUGH THE CHAMBER WHILE HEATING THE PARTICLES AND THE MANDREL TO A TEMPERATURE SUFFICIENT TO CAUSE THERMAL DECOMPOSITION OF THE SUBSTANCE AND DEPOSITION OF ISOTROPIC CARBON UPON THE MANDREL AND UPON THE PARTICLES, AND MAINTAINING SAID FLOW OF THE SUBSTANCE FOR A LENGTH OF TIME SUFFICIENT TO FORM A MASSIVE ISOTROPIC CARBON DEPOSIT UPON THE MANDREL, THE RATIO OF THE TOTAL DEPOSITION SURFACE AREA, MEASURED IN SQUARE CENTIMETERS, IN THE ACTIVE REGION OF THE CHAMBER WHEREIN DEPOSITION OCCURS, TO THE VOID VOLUME, MEASURED IN CUBIC CENTIMETERS, OF SAID ACTIVE REGION IS MAINTAINED AT LEAST ABOUT 5 TO 1 AND NO GREATER THAN ABOUT 20 TO 1.
Claim 2
Dependent Claim
137 words
A PROCESS FOR MAKING MASSIVE PYROLYTIC CARBON, WHICH PROCESS COMPRISES ESTABLISHING A BED OF PARTICLES IN A CHAMBER IN ASSOCIATION WITH A MANDREL IN THE CHAMBER, FLOWING A VAPORUS CARBON-CONTAINING SUBSTANCE THROUGH THE CHAMBER WHILE HEATING THE PARTICLES AND THE MANDREL TO A TEMPERATURE SUFFICIENT TO CAUSE THERMAL DECOMPOSITION OF THE SUBSTANCE AND DEPOSITION OF ISOTROPIC CARBON UPON THE MANDREL AND UPON THE PARTICLES, AND MAINTAINING SAID FLOW OF THE SUBSTANCE FOR A LENGTH OF TIME SUFFICIENT TO FORM A MASSIVE ISOTROPIC CARBON DEPOSIT UPON THE MANDREL, THE RATIO OF THE TOTAL DEPOSITION SURFACE AREA, MEASURED IN SQUARE CENTIMETERS, IN THE ACTIVE REGION OF THE CHAMBER WHEREIN DEPOSITION OCCURS, TO THE VOID VOLUME, MEASURED IN CUBIC CENTIMETERS, OF SAID ACTIVE REGION IS MAINTAINED AT LEAST ABOUT 5 TO 1 AND NO GREATER THAN ABOUT 20 TO 1.
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) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |