Patent US2539491A successfully refreshed from Google Patents.
US2539491A
Expired / Lapsed
US
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Composition for rubber compounding
Assignee: Baker Castor Oil Co
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Filing: 1946-09-04
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Granted: 1951-01-30
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Expires: 1966-09-04
Abstract
No abstract record available.
Inventors
- 👤 Smith Malcolm Kent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:20
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A COMPOSITION OF MATTER WHICH IS PARTICULARLY USEFUL AS A PROCESSING AID IN RUBBER COMPOUNDING, COMPRISING (1) A HEAT-THICKENED ESTER OF AN ALIPHATIC POLYHYDRIC ALCOHOL AND OF AN UNSATURATED ALIPHATIC ACID SELECTED FROM THE CLASS CONSISTING OF NATURALLY OCCURRING FATTY ACIDS AND SYNTHETIC ALIPHATIC, MONO-CARBOXYLIC ACIDS HAVING AT LEAST 11 CARBON ATOMS PER MOLECULE, (2) FROM 2% TO 100 BY WEIGHT OF CARBON BLACK BASED ON THE WEIGHT OF SAID ESTER, AND AS A PLASTICIZER FOR THE COMBINATION OF SAID ESTER AND SAID CARBON BLACK, (3) FROM 2% TO 100% OF FINELY DIVIDED ZINC OXIDE BASED UPON THE WEIGHT OF SAID ESTER SAID CARBON BLACK AND SAID FINELY DIVIDED ZINC OXIDE BEING SUBSTANTIALLY UNIFORMLY DISTRIBUTED IN SAID HEATTHICKENED ESTER, AND BEING SUBSTANTIALLY UNDISSOLVED THEREIN.
Claim 2
Dependent Claim
124 words
A COMPOSITION OF MATTER WHICH IS PARTICULARLY USEFUL AS A PROCESSING AID IN RUBBER COMPOUNDING, COMPRISING (1) A HEAT-THICKENED ESTER OF AN ALIPHATIC POLYHYDRIC ALCOHOL AND OF AN UNSATURATED ALIPHATIC ACID SELECTED FROM THE CLASS CONSISTING OF NATURALLY OCCURRING FATTY ACIDS AND SYNTHETIC ALIPHATIC, MONO-CARBOXYLIC ACIDS HAVING AT LEAST 11 CARBON ATOMS PER MOLECULE, (2) FROM 2% TO 100 BY WEIGHT OF CARBON BLACK BASED ON THE WEIGHT OF SAID ESTER, AND AS A PLASTICIZER FOR THE COMBINATION OF SAID ESTER AND SAID CARBON BLACK, (3) FROM 2% TO 100% OF FINELY DIVIDED ZINC OXIDE BASED UPON THE WEIGHT OF SAID ESTER SAID CARBON BLACK AND SAID FINELY DIVIDED ZINC OXIDE BEING SUBSTANTIALLY UNIFORMLY DISTRIBUTED IN SAID HEATTHICKENED ESTER, AND BEING SUBSTANTIALLY UNDISSOLVED THEREIN.
References Cited (Backward Citations)
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US1906749A
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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) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |