Patent US2675485A successfully refreshed from Google Patents.
US2675485A
Expired / Lapsed
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Lead pellet absorptive shield for betatrons
Assignee: Allis Chalmers Corp
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Filing: 1951-01-02
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Granted: 1954-04-13
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Expires: 1971-01-02
Abstract
No abstract record available.
Inventors
- 👤 Dane T Scag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:11
CPC Classifications
G; G21; G21F; G21F1/00; G21F1/02
Claims Analysis
Total Claims: 0
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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) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |