US3078302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dialkyl fumarates
Assignee: Monsanto Chemicals Ltd
•
Filing: 1958-09-25
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Granted: 1963-02-19
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Expires: 1978-09-25
Abstract
No abstract record available.
Inventors
- 👤 John E Franz
- 👤 Martin W Farrar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:10
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/593; C07C69/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN A PROCESS FOR PRODUCING A DIALKYL FUMARATE, THE STEPS COMPRISING REACTING AN ALKANOL CONTAINING 4 TO 12 CARBON ATOMS AND AN ALKYL ACID MALEATE IN THE PRESENCE OF HYDROGEN HALIDE, THE ALKYL GROUP OF SAID MALEATE HAVING 4 TO 12 CARBON ATOMS, THEREBY DIRECTLY FORMING DIALKYL FUMARATE, AND THEREAFTER RECOVERING SAID DIALKYL FUMARATE.
Claim 2
Dependent Claim
54 words
IN A PROCESS FOR PRODUCING A DIALKYL FUMARATE, THE STEPS COMPRISING REACTING AN ALKANOL CONTAINING 4 TO 12 CARBON ATOMS AND AN ALKYL ACID MALEATE IN THE PRESENCE OF HYDROGEN HALIDE, THE ALKYL GROUP OF SAID MALEATE HAVING 4 TO 12 CARBON ATOMS, THEREBY DIRECTLY FORMING DIALKYL FUMARATE, AND THEREAFTER RECOVERING SAID DIALKYL FUMARATE.
References Cited (Backward Citations)
US2544692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |