Patent US4400356A successfully refreshed from Google Patents.
US2808418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation of maleic esters and fatty esters
Assignee: General Mills Inc
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Filing: 1953-07-24
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Granted: 1957-10-01
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Expires: 1973-07-24
Abstract
No abstract record available.
Inventors
- 👤 Stuart A Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:29
CPC Classifications
C; C11; C11C; C11C3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS OF CONDENSING A LOWER ALIPHATIC ESTER OF A HIGHER SATURATED FATTY ACID CONTAINING FROM 8-22 CARBON ATOMS WITH A LOWER ALIPHATIC ESTER OF MALEIC ACID WHICH COMPRISES HEATING SAID ESTERS TO A TEMPERATURE WITHIN THE APPROXIMATE RANGE OF 100-250*C. IN THE PRESENCE OF A PEROXIDE HAVING THE FORMULA ROOR1 IN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND A HYDROCARBON GROUP AND R1 IS A HYDROCARBON GROUP.
Claim 2
Dependent Claim
72 words
A PROCESS OF CONDENSING A LOWER ALIPHATIC ESTER OF A HIGHER SATURATED FATTY ACID CONTAINING FROM 8-22 CARBON ATOMS WITH A LOWER ALIPHATIC ESTER OF MALEIC ACID WHICH COMPRISES HEATING SAID ESTERS TO A TEMPERATURE WITHIN THE APPROXIMATE RANGE OF 100-250*C. IN THE PRESENCE OF A PEROXIDE HAVING THE FORMULA ROOR1 IN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND A HYDROCARBON GROUP AND R1 IS A HYDROCARBON GROUP.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |