Patent US2614446A successfully refreshed from Google Patents.
Patent US3306825A successfully refreshed from Google Patents.
US3306825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactive spheroids coated with pyrolytic graphite
Assignee: Union Carbide Corp
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Filing: 1965-12-28
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Granted: 1967-02-28
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Expires: 1985-12-28
Abstract
No abstract record available.
Inventors
- 👤 Robert L Finicle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:29
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
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A RADIOACTIVE PARTICLE HAVING AN INNER UNCRACKED COATING OF LAMINAR PYROLYTIC GRAPHITE AND AN OUTER COATING OF COLUMNAR PYROLYTIC GRAPHITE, THE INTERIOR VOLUME ENCLOSED BY SAID INNER COATING BEING GREATER THAN THE VOL-
Claim 2
Dependent Claim
33 words
A RADIOACTIVE PARTICLE HAVING AN INNER UNCRACKED COATING OF LAMINAR PYROLYTIC GRAPHITE AND AN OUTER COATING OF COLUMNAR PYROLYTIC GRAPHITE, THE INTERIOR VOLUME ENCLOSED BY SAID INNER COATING BEING GREATER THAN THE VOL-
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |