US3515875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha-particle-emitting radioisotope generator
Assignee: Boeing North American Inc
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Filing: 1965-06-17
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Granted: 1970-06-02
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Expires: 1985-06-17
Abstract
No abstract record available.
Inventors
- 👤 Vahe Keshishian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:48
CPC Classifications
G; G21; G21G; G21G4/00; G21G4/02; A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/372; A61N1/378; B; B64; B64G; B64G1/00; B64G1/22; B64G1/42; B64G1/421; B64G1/422; C; C01; C01B; C01B21/00; C01B21/06; C01B21/0615; C01B21/063; C01B32/00; C01B32/90; C01G; C01G56/00; C01G56/004; C01G56/005; G21G4/04; G21H; G21H1/00; G21H1/10; G21H1/103; C01P; C01P2006/00; C01P2006/44; C01P2006/80; C01P2006/82; C01P2006/88; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A RADIOISOTOPE GENERATOR INCLUDING A FUEL CAPSULE AND A RADIATION SHIELD IN COOPERATIVE RELATION THEREWITH WHEREIN THE NEUTRON SHIELDING REQUIREMENT FOR SAID SHIELD IS SUBSTANTIALLY REDUCED BY PRESELECTING AS RADIOISOTOPE DUEL MATERIAL IN SAID CAPSULE AN ALPHA-PARTICLE-EMITTING RADIOACTIVE ISOTOPE COMBINED WITH COMPONENTS WHICH ESSENTIALLY HAVE A THRESHOLD FOR THE ALPHA-NEUTRON REACTION GREATER THAN THE MAXIMUM ENERGY OF THE ALPHA PARTICLE EMITTED BY SAID RADIOACTIVE ISOTOPE WHEREBY SECONDARY NEUTRON GENERATION BY A ALPHA-NEUTRON REACTION IS SUBSTANTIALLY REDUCED.
Claim 2
Dependent Claim
76 words
A RADIOISOTOPE GENERATOR INCLUDING A FUEL CAPSULE AND A RADIATION SHIELD IN COOPERATIVE RELATION THEREWITH WHEREIN THE NEUTRON SHIELDING REQUIREMENT FOR SAID SHIELD IS SUBSTANTIALLY REDUCED BY PRESELECTING AS RADIOISOTOPE DUEL MATERIAL IN SAID CAPSULE AN ALPHA-PARTICLE-EMITTING RADIOACTIVE ISOTOPE COMBINED WITH COMPONENTS WHICH ESSENTIALLY HAVE A THRESHOLD FOR THE ALPHA-NEUTRON REACTION GREATER THAN THE MAXIMUM ENERGY OF THE ALPHA PARTICLE EMITTED BY SAID RADIOACTIVE ISOTOPE WHEREBY SECONDARY NEUTRON GENERATION BY A ALPHA-NEUTRON REACTION IS SUBSTANTIALLY REDUCED.
References Cited (Backward Citations)
US3145181A
Cited
US3230374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |