Patent US3873466A successfully refreshed from Google Patents.
US3873466A
Expired / Lapsed
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Stabilisation of fats and oils with phenolic antioxidants
Assignee: Imperial Chemical Industries Ltd
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Filing: 1972-09-05
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Granted: 1975-03-25
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Expires: 1992-09-05
Abstract
Abstract Certain phenolic compounds, including 4-methoxy-2,6-ditert.butyl phenol, show synergism with certain thio dialkanoic acid esters and metal deactivating acids in stabilising edible oils and fats.
Inventors
- 👤 Ronald Barrie Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:56
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/70; A23B2/725; A23B2/729; A23B2/742; C; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035; C11B5/0092
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
24 words
A COMPOSITION FOR STABILISING FATS AND OILS WHICH COMPRISES A STABILISING AMOUNT OF A SYNERGISTIC MIXTURE OF (I) A PHENOLIC COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
24 words
A COMPOSITION FOR STABILISING FATS AND OILS WHICH COMPRISES A STABILISING AMOUNT OF A SYNERGISTIC MIXTURE OF (I) A PHENOLIC COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
18 words
A composition as claimed in claim 1 in which R1 and R2 have 4 to 8 carbon atoms.
Claim 4
Dependent Claim
16 words
A composition as claimed in claim 2 in which R1 and R2 are tertiary butyl groups.
Claim 5
Dependent Claim
15 words
A composition as claimed in claim 1 which p and q are 2 or 3.
Claim 6
Dependent Claim
21 words
A composition as claimed in claim 4 in which R4 and R5 are alkyl groups having 12 to 18 carbon atoms.
Claim 7
Dependent Claim
24 words
A composition as claimed in claim 1 in which the metal deactivating acid is citric acid, tartaric acid, ethylenediamine tetra-acetic acid or malic acid.
Claim 8
Dependent Claim
22 words
A composition as claimed in claim 1 which comprises 4-methoxy-2, 6-di-tert.butyl phenol and a compound from each of groups (ii) and (iii).
Claim 9
Dependent Claim
37 words
A composition as claimed in claim 7 in which component (ii) and/or component (iii) are present in ratios of between 10 : 1 and 1 : 10 parts by weight based on the weight of component (i).
Claim 10
Dependent Claim
62 words
A composition as claimed in claim 1 which contains at least 1 part by weight of component (ii) and/or component (iii) for every 10 parts of component (i) and wherein component (iii) is citric acid, tartaric acid, ethylenediamine tetra-acetic acid, ortho-, meta- or pyrophosphoric acid, gluconic acid or malic acid or the non-toxic lithium, strontium, sodium, potassium, magnesium or calcium salts thereof.
Claim 11
Dependent Claim
16 words
A COMPOSITION FOR STABILISING FATS AND OILS WHICH COMPRISES (I) A PHENOLIC COMPOUND OF THE FORMULA
Claim 12
Dependent Claim
16 words
A COMPOSITION FOR STABILISING FATS AND OILS WHICH COMPRISES (I) A PHENOLIC COMPOUND OF THE FORMULA
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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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |