US2843452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precipitation of protactinium
Assignee: Individual
•
Filing: 1956-11-02
•
Granted: 1958-07-15
•
Expires: 1976-11-02
Abstract
No abstract record available.
Inventors
- 👤 Moore Robert Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:27
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS OF RECOVERING PROTACTINIUM VALUES FROM AN AQUEOUS NITRIC ACID SOLUTION, COMPRISING INCORPORATING A WATER-SOLUBLE SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF DIVALENT TIN AND DIVALENT LEAD TO SAID SOLUTION, OXIDIZING THE SALT WHEREBY THE DIOXIDE OF SAID METAL IS OBTAINED IN THE FORM OF A PRECIPITATE AND SAID PROTACTINIUM VALUES ARE CARRIED ON SAID PRECIPITATE, AND SEPARATING SAID PRECIPITATE FROM SAID SOLUTION.
Claim 2
Dependent Claim
67 words
A PROCESS OF RECOVERING PROTACTINIUM VALUES FROM AN AQUEOUS NITRIC ACID SOLUTION, COMPRISING INCORPORATING A WATER-SOLUBLE SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF DIVALENT TIN AND DIVALENT LEAD TO SAID SOLUTION, OXIDIZING THE SALT WHEREBY THE DIOXIDE OF SAID METAL IS OBTAINED IN THE FORM OF A PRECIPITATE AND SAID PROTACTINIUM VALUES ARE CARRIED ON SAID PRECIPITATE, AND SEPARATING SAID PRECIPITATE FROM SAID SOLUTION.
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |