US2922722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a carbon body of increased density
Assignee: Individual
•
Filing: 1957-12-02
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Granted: 1960-01-26
•
Expires: 1977-12-02
Abstract
No abstract record available.
Inventors
- 👤 Hutcheon John Malcolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:13
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
113 words
A METHOD OF PRODUCING A CARBON BODY OF INCREASED DENSITY AND DECREASED PERMEABILITY, COMPRISING THE STEPS OF MAINTAINING A TEMPERATURE GRADIENT WITHIN A PERMEABLE CARBON BODY SUCH THAT A SURFACE AREA OF THE BODY IS AT A LOWER TEMPERATURE THAN THE REMAINDER OF THE BODY, SUPPLYING A GASEOUS CARBONISABLE COMPOUND ONLY TO SAID SURFACE AREA, THE TEMPERATURE OF SAID SURFACE AREA BEING BELOW THAT AT WHICH CRACKING OF THE CARBONISABLE COMPOUND OCCURS TO FORM CARBON, THE TEMPERATURE OF AT LEAST PART OF THE REMAINDER OF THE BODY BEING ABOVE THAT AT WHICH SAID CRACKING OCCURS, WHEREBY CARBON IS DEPOSITED ONLY IN THE PORES OF THE BODY AND NOT ON THE SAID SURFACE AREA.
Claim 2
Independent Claim
113 words
A METHOD OF PRODUCING A CARBON BODY OF INCREASED DENSITY AND DECREASED PERMEABILITY, COMPRISING THE STEPS OF MAINTAINING A TEMPERATURE GRADIENT WITHIN A PERMEABLE CARBON BODY SUCH THAT A SURFACE AREA OF THE BODY IS AT A LOWER TEMPERATURE THAN THE REMAINDER OF THE BODY, SUPPLYING A GASEOUS CARBONISABLE COMPOUND ONLY TO SAID SURFACE AREA, THE TEMPERATURE OF SAID SURFACE AREA BEING BELOW THAT AT WHICH CRACKING OF THE CARBONISABLE COMPOUND OCCURS TO FORM CARBON, THE TEMPERATURE OF AT LEAST PART OF THE REMAINDER OF THE BODY BEING ABOVE THAT AT WHICH SAID CRACKING OCCURS, WHEREBY CARBON IS DEPOSITED ONLY IN THE PORES OF THE BODY AND NOT ON THE SAID SURFACE AREA.
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) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |