US3190835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal deactivators
Assignee: Shell USA Inc
•
Filing: 1961-06-28
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Granted: 1965-06-22
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Expires: 1981-06-28
Abstract
No abstract record available.
Inventors
- 👤 Smithuysen Wilhelm Brezesinska
- 👤 Daniel Van Velzen
- 👤 Jacob C Caron
- 👤 Bruine Wim De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:53
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/14; C07C; C07C251/00; C07D417/00; C07D417/14; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C10L1/24; C10L1/2443; C10L1/2456; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2215/00; C10M2215/14; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2223/00; C10M2223/06; C10M2223/061; C10M2227/00; C10M2227/08; C10M2227/081; C10N; C10N2040/00; C10N2040/08; C10N2040/14; C10N2040/16; C10N2040/17; C10N2040/25; C10N2040/252; C10N2040/253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A LIQUID HYDROCARBON OIL, NORMALLY CONTAINING TRACE AMOUNTS OF ALKALI AND POLYVALENT OXIDATIVE CATALYZING METALS, HAVING IMPROVED OXIDATIVE STABILITY CONTAINING 0-1-150 P.P.M. BY WEIGHT OF A COMPLEXING AGENT CAPABLE OF FORMING COMPLEXES WITH POLYVALENT METALS IN THE PRESENCE OF ALKALI HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
44 words
A LIQUID HYDROCARBON OIL, NORMALLY CONTAINING TRACE AMOUNTS OF ALKALI AND POLYVALENT OXIDATIVE CATALYZING METALS, HAVING IMPROVED OXIDATIVE STABILITY CONTAINING 0-1-150 P.P.M. BY WEIGHT OF A COMPLEXING AGENT CAPABLE OF FORMING COMPLEXES WITH POLYVALENT METALS IN THE PRESENCE OF ALKALI HAVING THE STRUCTURAL FORMULA
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |