US3247008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating radioactive spheroids with pyrolytic graphite
Assignee: Union Carbide Corp
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Filing: 1962-12-18
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Granted: 1966-04-19
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Expires: 1982-12-18
Abstract
No abstract record available.
Inventors
- 👤 Robert L Finicle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:26
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/626; C; C01; C01B; C01B32/00; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR COATING RADIOACTIVE PARTICLES WITH PYROLYTIC GRAPHITE BY PYROLYSIS OF A GASEOUS HYDROCARBON WHICH COMPRISES CONTACTING SAID RADIOACTIVE PARTICLES WITH AN ATMOSPHERE COMPRISING A HYDROCARBON GAS AND AN INERT DILUENT AT A TEMPERATURE SLIGHTLY BELOW THE SURFACE SINTERING TEMPERATURE OF THE RADIOACTIVE PARTICLES FOR A PERIOD OF TIME SUFFICIENT TO DEPOSIT A THIN LAYER OF LAMINAR PYROLYTIC GRAPHITE ON SAID PARTICLES, RAISING THE TEMPERATURE ABOVE ABOUT 1800*C. AND DEPOSITING A SECOND LAYER OF COLUMNAR PYROLYTIC GRAPHITE.
Claim 2
Dependent Claim
78 words
A PROCESS FOR COATING RADIOACTIVE PARTICLES WITH PYROLYTIC GRAPHITE BY PYROLYSIS OF A GASEOUS HYDROCARBON WHICH COMPRISES CONTACTING SAID RADIOACTIVE PARTICLES WITH AN ATMOSPHERE COMPRISING A HYDROCARBON GAS AND AN INERT DILUENT AT A TEMPERATURE SLIGHTLY BELOW THE SURFACE SINTERING TEMPERATURE OF THE RADIOACTIVE PARTICLES FOR A PERIOD OF TIME SUFFICIENT TO DEPOSIT A THIN LAYER OF LAMINAR PYROLYTIC GRAPHITE ON SAID PARTICLES, RAISING THE TEMPERATURE ABOVE ABOUT 1800*C. AND DEPOSITING A SECOND LAYER OF COLUMNAR PYROLYTIC GRAPHITE.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |