Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Nitrogen and heavy metal – or nitrogen and aluminum – in the...
Reexamination Certificate
2007-08-17
2011-11-01
Caldarola, Glenn (Department: 1771)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Nitrogen and heavy metal, or nitrogen and aluminum, in the...
C508S366000, C508S585000, C564S433000, C564S434000
Reexamination Certificate
active
08048833
ABSTRACT:
The present invention is directed to lubricating oils exhibiting improved resistance to oxidation and deposit/sludge formation comprising a lubricant base oil and catalytic antioxidants comprising an effective amount of a) one or more polymetal organometallic compound; and, b) effective amounts of one or more substituted N,N′-diaryl-o-phenylenediamine compounds or c) one or more hindered phenol compounds or both, to a method for improving the antioxidancy and the resistance to deposit/sludge formation of formulated lubricating oil compositions by the addition thereto of an effective amount of the aforementioned catalytic antioxidants, and to an additive concentrate containing the aforementioned catalytic antioxidants.
REFERENCES:
patent: 2645613 (1953-07-01), Adelson et al.
patent: 3018248 (1962-01-01), Foehr
patent: 3764534 (1973-10-01), Blejean et al.
patent: 3779920 (1973-12-01), Devries
patent: 4066561 (1978-01-01), Nnadi
patent: 4871875 (1989-10-01), Nagata et al.
patent: 5376154 (1994-12-01), Daly et al.
patent: 5824627 (1998-10-01), McConnachie et al.
patent: 6455477 (2002-09-01), L'Heureux
patent: 2003/0196372 (2003-10-01), Wolf
patent: 2006/0149089 (2006-07-01), Malfroy-Camine et al.
patent: 2006/0258549 (2006-11-01), Habeeb et al.
patent: 2007/0265178 (2007-11-01), Patil et al.
patent: 2008/0245336 (2008-10-01), Patil et al.
patent: 2008/0248984 (2008-10-01), Patil et al.
patent: 2008/0248985 (2008-10-01), Patil et al.
patent: 1 702 973 (2006-09-01), None
patent: WO 03/006420 (2003-01-01), None
patent: WO 2008/039345 (2008-04-01), None
Joseph A. Bonadies et al., Structurally Diverse Manganese (III) Schiff Base COmplexes: Chains, Dimers, and Cages, Sep. 2, 1988, Inorganic Chemistry, 28, 2037-2044.
Gopal L. Tembe, et al., “Oxidation of alkanes by tert-butyl hydroperoxide catalyzed by polynuclear manganese Schiff base complexes”,Journal of Molecular Catalysis A: Chemical121 (1997), pp. 17-23.
M. Tyler Caudle, et al., “Mechanism for the Homolytic Cleavage of Alkyl Hydroperoxides by the Manganese(III) Dimer MnIII2(2-OHsalpn)2”,Inorg. Chem., 1996, 35, pp. 3577-3584.
K. Srinivasan, et al., “Dual Pathways for Manganese Catalysis of Olefin Oxidation with Alkyl Hydroperoxides”,Journal of Molecular Catalysis, 36 (1986), pp. 297-317.
Habeeb Jacob J.
Landis Michael E.
Patil Abhimanyu O.
Weldon Brandon T
Caldarola Glenn
ExxonMobil Research and Engineering Company
Montalvo Liza
Vasisth Vishal
LandOfFree
Catalytic antioxidants does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Catalytic antioxidants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalytic antioxidants will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4284888