US3317338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrolytic graphite coating process
Assignee: Individual
•
Filing: 1964-01-07
•
Granted: 1967-05-02
•
Expires: 1984-01-07
Abstract
No abstract record available.
Inventors
- 👤 James D Batchelor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:50
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C01; C01B; C01B32/00; C04B41/45; C04B41/50; C04B41/5001; C04B41/80; C04B41/81; C04B41/85; C23; C23C; C23C16/00; C23C16/22; C23C16/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE PROCESS FOR FORMING A HIGH-TEMPERATURE RESISTANT AND EROSION RESISTANT COATING OF PYROLYTIC GRAPHITE ON A GRAPHITE SUBSTRATE COMPRISING THE STEPS OF: (A) HEATING SAID SUBSTRTE TO A TEMPERTURE WITHIN THE RANGE OF ABOUT 1900*C. TO ABOUT 2400*C.: AND (B) CONTINUOUSLY PASSING A GASEOUS MIXTURE OF AN INERT GAS ELEMENT AND A LOWER ALIPHATIC HYDROCARBON GAS OVER THE SURFACE OF THE HEATED SUBSTRATE AT A TOTAL GAS FLOW RATE OF ABOUT 10 CUBIC FEET (STP) TO ABOUT 20 CUBIC FEET (STP) PER HOUR, SAID HYDROCARBON GAS COMPRISING FROM ABOUT 1% BY VOLUME TO ABOUT 6% BY VOLUME OF THE TOTAL VOLUME OF SAID GASEOUS MIXTURE AND SAID INERT GAS COMPRISING SUBSTANTIALLY THE REMAINDER OF THE TOTAL VOLUME OF SAID GASEOUS MIXTURE.
Claim 2
Dependent Claim
121 words
THE PROCESS FOR FORMING A HIGH-TEMPERATURE RESISTANT AND EROSION RESISTANT COATING OF PYROLYTIC GRAPHITE ON A GRAPHITE SUBSTRATE COMPRISING THE STEPS OF: (A) HEATING SAID SUBSTRTE TO A TEMPERTURE WITHIN THE RANGE OF ABOUT 1900*C. TO ABOUT 2400*C.: AND (B) CONTINUOUSLY PASSING A GASEOUS MIXTURE OF AN INERT GAS ELEMENT AND A LOWER ALIPHATIC HYDROCARBON GAS OVER THE SURFACE OF THE HEATED SUBSTRATE AT A TOTAL GAS FLOW RATE OF ABOUT 10 CUBIC FEET (STP) TO ABOUT 20 CUBIC FEET (STP) PER HOUR, SAID HYDROCARBON GAS COMPRISING FROM ABOUT 1% BY VOLUME TO ABOUT 6% BY VOLUME OF THE TOTAL VOLUME OF SAID GASEOUS MIXTURE AND SAID INERT GAS COMPRISING SUBSTANTIALLY THE REMAINDER OF THE TOTAL VOLUME OF SAID GASEOUS MIXTURE.
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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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |