Patent US3798305A successfully refreshed from Google Patents.
US3798305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovering rhenium values from organic extractant solutions
Assignee: GTE Sylvania Inc
•
Filing: 1972-05-19
•
Granted: 1974-03-19
•
Expires: 1992-05-19
Abstract
Abstract A PROCESS IS DISCLOSED WHEREIN ESSENTIALLY ALL OF THE RHENIUM CAN BE RECOVERED FROM ORGANIC EXTRACTANT SOLUTIONS WHICH SELECTIVELY EXTRACT RHENIUM FROM AQUEOUS SOLUTIONS CONTAINING MOLYBDENUM A STRIPPING SOLUTION OF NITRIC ACID REMOVES THE RHENIUM AND CAN BE RECYCLED TO OBTAIN A HIGH CONCENTRATION OF RHENIUM IN THE STRIPPING SOLUTION.
Inventors
- 👤 L Pagnozzi
- 👤 J Patton
- 👤 M Macinnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:13
CPC Classifications
C; C22; C22B; C22B61/00; C01; C01G; C01G47/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |