Patent US2505486A successfully refreshed from Google Patents.
US3791968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sorbent for removal of heavy metals
Assignee: Mobil Oil AS
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Filing: 1972-12-29
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Granted: 1974-02-12
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Expires: 1992-12-29
Abstract
Abstract A NOVEL USE FOR SORBENTS INVOLVING THE SELECTIVE REMOVAL OF HEAVY METALS FROM LIQUID STREAMS HAS BEEN DISCOVERED MORE SPECIFICALLY IT HAS BEEN DISCOVERED THAT THESE SORBENTS SELECTIVELY REMOVE ALKYLL LEAD MOIETIES FROM GASOLINE. THE SORBENTS ARE COMPRISED OF METAL HALIDES (PREFERABLY TIN TETRACHLORIDE OR ANTIMONY PENTACHLORIDE) BONDED TO A SUITABLE SUBSTRATE THROUGH TERTIARY AMINE OR ALKYL HALIDE FUNCTIONAL GROUPS. THE SORBENDS CAN BE EFFECTIVELY REGENERATED.
Inventors
- 👤 D Whitehurst
- 👤 S Butter
- 👤 P Rodewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:48
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; C; C10; C10G; C10G25/00; C10G25/02
Claims Analysis
Total Claims: 0
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |