Patent US3243254A successfully refreshed from Google Patents.
US3243254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for extracting lanthanides and actinides
Assignee: Individual
•
Filing: 1963-08-20
•
Granted: 1966-03-29
•
Expires: 1983-08-20
Abstract
No abstract record available.
Inventors
- 👤 Iii Thomas H Siddall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:13
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS FOR THE RECOVERY OF TRIVALENT LANTHANIDE AND ACTINIDE VALUES FROM AN AQUEOUS SOLUTION WHICH COMPRISES: (A) CONTACTING SAID AQUEOUS SOLUTION WITH A BIDENTATE ORGANIC EXTRACTANT SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE GENERAL FORMULAE:
Claim 2
Dependent Claim
38 words
A PROCESS FOR THE RECOVERY OF TRIVALENT LANTHANIDE AND ACTINIDE VALUES FROM AN AQUEOUS SOLUTION WHICH COMPRISES: (A) CONTACTING SAID AQUEOUS SOLUTION WITH A BIDENTATE ORGANIC EXTRACTANT SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE GENERAL FORMULAE:
References Cited (Backward Citations)
US2943923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |