US3436213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for recovering metals from sea water
Assignee: Individual
•
Filing: 1967-04-04
•
Granted: 1969-04-01
•
Expires: 1987-04-04
Abstract
No abstract record available.
Inventors
- 👤 Edward O Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:28
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3317312A
Cited
US2653089A
Cited
US2726141A
Cited
US2866827A
Cited
US2974101A
Cited
US3062379A
Cited
US3094437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |