Patent US2755272A successfully refreshed from Google Patents.
US2755272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Natural and synthetic rubber containing as antioxidants di(hydroxy-3, 5-hydrocarbon-substituted-phenyl) methane and its salts
Assignee: Imperial Chemical Industries Ltd
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Filing: 1953-03-02
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Granted: 1956-07-17
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Expires: 1973-03-02
Abstract
No abstract record available.
Inventors
- 👤 Lambert Arthur
- 👤 Boris N Leyland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:03
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035; C07; C07C; C07C37/00; C07C37/11; C07C37/16; C07C37/18; C07C37/20; C07C39/00; C07C39/12; C07C39/15; C07C39/16; C07C39/17; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C10; C10M; C10M1/00; C10M1/08; C10M129/00; C10M129/02; C10M129/04; C10M129/10; C07C2601/00; C07C2601/12; C07C2601/14; C07C2602/00; C07C2602/36; C07C2602/42; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10N; C10N2050/00; C10N2050/10; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A COMPOSITION COMPRISING A RUBBERY POLYMER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, POLYMERS OF BUTADIENE AND POLYMERS OF CHLOROBUTADIENE HAVING INCORPORATED THEREIN AT LEAST ONE ANTIOXIDANT SELECTED FROM THE GROUP CONSISTING OF 2:2''-DIHYDROXY-3-TERT-BUTYL3'':5:5'' -TRIMETHYL- DIPHENYLMETHANE,2:2'' -DIHYDROXY-3TERT-BUTYL-3'' - SEC - BUTYL - 5:5'' - DIMETHYLDIPHENYLMETHANE, 2:2''-DIHYDROXY -3 - (1:1:3:3 - TETRAMETHYLBUTYL) - 3'':5:5''TRIMETHYLDIPHENYLMETHANE, 2:2''-DIHYDROXY-3 - TERT - BUTYL3''-ISOBORNYL -5:5'' -DIMETHYLDIPHENYLMETHANE, 2:2'' -DIHYDROXY-3-TERT-BUTYL-3''-CYCLOHEXYL-5:5 - DIMETHYLDIPHENYLMETHANE AND THE BASIC AND NORMAL ALUMINUM, BARIUM, CALCIUM, MAGNESIUM, STRONTIUM AND ZINC SALTS OF SUCH METHANES.
Claim 2
Dependent Claim
81 words
A COMPOSITION COMPRISING A RUBBERY POLYMER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, POLYMERS OF BUTADIENE AND POLYMERS OF CHLOROBUTADIENE HAVING INCORPORATED THEREIN AT LEAST ONE ANTIOXIDANT SELECTED FROM THE GROUP CONSISTING OF 2:2''-DIHYDROXY-3-TERT-BUTYL3'':5:5'' -TRIMETHYL- DIPHENYLMETHANE,2:2'' -DIHYDROXY-3TERT-BUTYL-3'' - SEC - BUTYL - 5:5'' - DIMETHYLDIPHENYLMETHANE, 2:2''-DIHYDROXY -3 - (1:1:3:3 - TETRAMETHYLBUTYL) - 3'':5:5''TRIMETHYLDIPHENYLMETHANE, 2:2''-DIHYDROXY-3 - TERT - BUTYL3''-ISOBORNYL -5:5'' -DIMETHYLDIPHENYLMETHANE, 2:2'' -DIHYDROXY-3-TERT-BUTYL-3''-CYCLOHEXYL-5:5 - DIMETHYLDIPHENYLMETHANE AND THE BASIC AND NORMAL ALUMINUM, BARIUM, CALCIUM, MAGNESIUM, STRONTIUM AND ZINC SALTS OF SUCH METHANES.
References Cited (Backward Citations)
US2570402A
Cited
US2628953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |