Patent US4031389A successfully refreshed from Google Patents.
US4031389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isotope separation using metallic vapor lasers
Assignee: National Aeronautics and Space Administration
•
Filing: 1974-06-26
•
Granted: 1977-06-21
•
Expires: 1994-06-26
Abstract
Abstract The isotope U 235 is separated from a gasified isotope mixture of U 235 and U 238 by selectively exciting the U 235 from the ground state utilizing resonant absorption of radiation from precisely tuned lasers. The excited isotope is then selectively ionized by electron bombardment. It then is separated from the remaining isotope mixture by electromagnetic separation.
Inventors
- 👤 Gary R. Russell
- 👤 Che Jen Chen
- 👤 Kenneth G. Harstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:46
CPC Classifications
B; B01; B01D; B01D59/00; B01D59/34; H; H01; H01J; H01J49/00; H01J49/02; H01J49/10; H01J49/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |