US3168485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of metal contaminants from activated carbon
Assignee: Standard Oil Co
•
Filing: 1960-06-27
•
Granted: 1965-02-02
•
Expires: 1980-06-27
Abstract
No abstract record available.
Inventors
- 👤 James O Knobloch
- 👤 Russell V Malo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:34
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/47; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/378
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A PROCESS FOR REMOVING METALS FROM ACTIVATED CARBON WHICH COMPRISES CONTACTING ACTIVATED CABON WITH A SOLUTION OF A BENZENE POLYCARBOXYLIC ACID IN A POLAR SOLVENT.
Claim 2
Dependent Claim
25 words
A PROCESS FOR REMOVING METALS FROM ACTIVATED CARBON WHICH COMPRISES CONTACTING ACTIVATED CABON WITH A SOLUTION OF A BENZENE POLYCARBOXYLIC ACID IN A POLAR SOLVENT.
References Cited (Backward Citations)
US1533031A
Cited
US2300600A
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US2380731A
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US2668798A
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US2740762A
Cited
US2927130A
Cited
US2923736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |