US3511774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the demetallization of petroleum residuums
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-01-25
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Granted: 1970-05-12
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Expires: 1988-01-25
Abstract
No abstract record available.
Inventors
- 👤 Robert B Long
- 👤 Herman J Solomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:15
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0403; B01D11/0407; B01D11/0488; D; D01; D01H; D01H1/00; D01H1/14; D01H1/20; D01H1/28; D01H4/00; D01H4/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |