US4693837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tertiary butyl derivatives of toluenediamine and mixtures as antioxidant for organic materials
Assignee: Air Products and Chemicals Inc
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Filing: 1986-12-04
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Granted: 1987-09-15
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Expires: 2006-12-04
Abstract
Abstract This invention relates to the use of tertiary butyl derivatives of toluenediamine and specifically 5-tert-butyl-2,4-toluenediamine as an antioxidant material for preventing oxidation of organic materials.
Inventors
- 👤 Dale D. Dixon
- 👤 William F. Burgoyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/02; C10M133/04; C10M133/12; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C09; C09K; C09K15/00; C09K15/04; C09K15/16; C09K15/18; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/066
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
In an organic material normally susceptible to gradual degradation in the presence of oxygen during use over an extended period of time and of the type in which an aromatic diamine has been added as an antioxidant, the improvement which comprises utilizing 5-tert-butyl-2,4-toluenediamine as said aromatic diamine.
Claim 2
Dependent Claim
47 words
In an organic material normally susceptible to gradual degradation in the presence of oxygen during use over an extended period of time and of the type in which an aromatic diamine has been added as an antioxidant, the improvement which comprises utilizing 5-tert-butyl-2,4-toluenediamine as said aromatic diamine.
Claim 3
Dependent Claim
22 words
The organic material of claim 1 wherein said aromatic diamine comprises a mixture of 65-80% 5-tert-butyl-2,4-toluenediamine and 20-35% of 3-tert-butyl-2,6-toluenediamine by weight.
Claim 4
Dependent Claim
23 words
The organic material of claim 1 wherein the level of aromatic diamine is from 0.1 to 10% by weight in said organic material.
Claim 5
Dependent Claim
27 words
The organic material of claim 1 wherein said organic material is a hydrocarbon oil and the level present in said hydrocarbon oil is from 0.25-5% by weight.
Claim 6
Dependent Claim
13 words
The organic material of claim 4 wherein said hydrocarbon oil is mineral oil.
Claim 7
Dependent Claim
14 words
The organic material of claim 4 wherein said hydrocarbon oil is a hydraulic oil.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |