Patent US2909537A successfully refreshed from Google Patents.
US2909537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying oils
Assignee: A Boake Roberts and Co Ltd
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Filing: 1957-11-04
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Granted: 1959-10-20
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Expires: 1977-11-04
Abstract
No abstract record available.
Inventors
- 👤 Chatfield Herbert Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:14
CPC Classifications
C; C09; C09F; C09F7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR THE PRODUCTION OF IMPROVED DRYING OIL COMPOUNDS, WHICH COMPRISES HEATING AN ACID MIXTURE DERIVED FROM AN OIL SELECTED FROM THE GROUP CONSISTING OF DRYING AND SEMI-DRYING OILS, MIXTURES OF DRYING OILS WITH NON-DRYING OILS AND MIXTURES OF SEMI-DRYING OILS WITH NON-DRYING OILS, TOGETHER WITH AN EPOXIDISED ESTER SELECTED FROM THE GROUP CONSISTING OF THE GLYCERIDE AND HIGHER POLYHYDRIC ALCOHOL ESTERS OF ACIDS HAVING AN IODINE VALUE NOT LESS THAN 80 IN WHICH THE UNSATURATION HAS BEEN AT LEAST PARTIALLY REMOVED BY THE FORMATION OF EPOXY GROUPS ACROSS THE DOUBLE BONDS AND CONTINUING THE SAID HEATING UNTIL A REDUCTION OF THE ACID VALUE OF THE MIXTURE HAS BEEN ATTAINED.
Claim 2
Dependent Claim
111 words
A PROCESS FOR THE PRODUCTION OF IMPROVED DRYING OIL COMPOUNDS, WHICH COMPRISES HEATING AN ACID MIXTURE DERIVED FROM AN OIL SELECTED FROM THE GROUP CONSISTING OF DRYING AND SEMI-DRYING OILS, MIXTURES OF DRYING OILS WITH NON-DRYING OILS AND MIXTURES OF SEMI-DRYING OILS WITH NON-DRYING OILS, TOGETHER WITH AN EPOXIDISED ESTER SELECTED FROM THE GROUP CONSISTING OF THE GLYCERIDE AND HIGHER POLYHYDRIC ALCOHOL ESTERS OF ACIDS HAVING AN IODINE VALUE NOT LESS THAN 80 IN WHICH THE UNSATURATION HAS BEEN AT LEAST PARTIALLY REMOVED BY THE FORMATION OF EPOXY GROUPS ACROSS THE DOUBLE BONDS AND CONTINUING THE SAID HEATING UNTIL A REDUCTION OF THE ACID VALUE OF THE MIXTURE HAS BEEN ATTAINED.
References Cited (Backward Citations)
US2660563A
Cited
US2752376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |