Patent US2977220A successfully refreshed from Google Patents.
US2977220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing uranium
Assignee: Individual
•
Filing: 1944-09-28
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Granted: 1961-03-28
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Expires: 1964-09-28
Abstract
No abstract record available.
Inventors
- 👤 Wood Cissie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:47
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR THE PRODUCTION OF URANIUM IN MASSIVE FORM BY HEATING TO REACTION TEMPERATURE IN AN OPEN CONTAINER DEEP IN COMPARISON WITH ITS CROSS SECTION A MIXTURE CONSISTING OF SUBSTANTIALLY ANHYDROUS URANIUM TETRAFLUORIDE IN FINELY DIVIDED FORM AND CALCIUM, CHARACTERISED IN THAT THE CALCIUM IS IN THE FORM OF SMALL PLATE-LIKE PIECES OF THICKNESS BETWEEN 1/32 AND 1/80 INCH, AND HAS A PACKING DENSITY SUCH THAT THE FREE SPACE BETWEEN THE PIECES OF CALCIUM SUBSTANTIALLY EQUAL TO THE VOLUME OF THE URANIUM TETRAFLUORIDE.
Claim 2
Dependent Claim
84 words
A PROCESS FOR THE PRODUCTION OF URANIUM IN MASSIVE FORM BY HEATING TO REACTION TEMPERATURE IN AN OPEN CONTAINER DEEP IN COMPARISON WITH ITS CROSS SECTION A MIXTURE CONSISTING OF SUBSTANTIALLY ANHYDROUS URANIUM TETRAFLUORIDE IN FINELY DIVIDED FORM AND CALCIUM, CHARACTERISED IN THAT THE CALCIUM IS IN THE FORM OF SMALL PLATE-LIKE PIECES OF THICKNESS BETWEEN 1/32 AND 1/80 INCH, AND HAS A PACKING DENSITY SUCH THAT THE FREE SPACE BETWEEN THE PIECES OF CALCIUM SUBSTANTIALLY EQUAL TO THE VOLUME OF THE URANIUM TETRAFLUORIDE.
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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |