US3578442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making means for venting helium from a radioisotope container
Assignee: United States Atomic Energy Commission
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Filing: 1968-10-15
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Granted: 1971-05-11
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Expires: 1988-10-15
Abstract
Abstract D R A W I N G FILTER MEANS AND METHOD OF MAKING THE SAME FOR VENTING HELIUM GAS THROUGH A RADIOSCOTOPE CONTAINER WALL AND PREVENTING OR MINIMIZING ESCAPE OF RADIOISOTOPES AND RADIOACTIVITY, COMPRISING A POROUS TABLET FORMING A PART OF THE WALL INCLUDING A PRESSED AND SINTERED PARTICUALTE BLEND OF A REFRACTORY METAL AND A HEAT RESISTIVE MATERIAL TO PROVIDE POROSITY AND STRENGTH AT ELEVATED TEMPERATURES.
Inventors
- 👤 Charles G Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:34
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/10; C22C1/1084; B; B01; B01D; B01D53/00; B01D53/22; B01D53/228; G; G21; G21G; G21G4/00; G21G4/04; G21G4/06; G21H; G21H1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |