Patent US2559793A successfully refreshed from Google Patents.
US2559793A
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Beta irradiation method and means
Assignee: Canadian Radium and Uranium Corp
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Filing: 1949-01-27
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Granted: 1951-07-10
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Expires: 1969-01-27
Abstract
No abstract record available.
Inventors
- 👤 Pregel Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:10
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/10; A61N5/1001; A61N5/1014; A61N5/1017; G; G21; G21G; G21G4/00; G21G4/04; G21G4/06; A61N2005/1085; A61N2005/1089
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
AN OPHTHALMIC APPLICATOR WHICH HAS RADIOACTIVE MATERIAL WHICH CONSISTS SUBSTANTIALLY WHOLLY OF RADIUM D AND RADIUM E AND RADIUM F, SAID APPLICATOR HAVING FILTER MEANS WHICH ARE PERMEABLE SUBSTANTIALLY ONLY TO BETA RAYS EMITTED AT THE ENERGY LEVEL OF THE BETA RAYS EMITTED BY RADIUM E.
Claim 2
Dependent Claim
46 words
AN OPHTHALMIC APPLICATOR WHICH HAS RADIOACTIVE MATERIAL WHICH CONSISTS SUBSTANTIALLY WHOLLY OF RADIUM D AND RADIUM E AND RADIUM F, SAID APPLICATOR HAVING FILTER MEANS WHICH ARE PERMEABLE SUBSTANTIALLY ONLY TO BETA RAYS EMITTED AT THE ENERGY LEVEL OF THE BETA RAYS EMITTED BY RADIUM E.
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) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |