US3469971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of platinum from deactivated catalysts
Assignee: Universal Oil Products Co
•
Filing: 1967-02-28
•
Granted: 1969-09-30
•
Expires: 1987-02-28
Abstract
No abstract record available.
Inventors
- 👤 James G Leopard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:46
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/009; C22B11/00; C22B11/04; C22B11/042; C22B11/048; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2369956A
Cited
US2641582A
Cited
US2740762A
Cited
US2704281A
Cited
US3134732A
Cited
US3206413A
Cited
US3357915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |