US2841592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing alpha-alkoxybenzylsuccinic anhydrides and nuclearly substituted benzyl derivatives thereof
Assignee: Monsanto Chemicals Ltd
•
Filing: 1953-06-23
•
Granted: 1958-07-01
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Expires: 1973-06-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Raymond I Longley
- 👤 Jr Tracy M Patrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:05
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/40; C07C59/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
THE PROCESS COMPRISING THE REACTION OF 1 MOLE OF MALEIC ANHYDRIDE WITH 1 MOLE OF A BENZYL ALKYL ETHER HAVING THE FORMULA:
Claim 2
Dependent Claim
22 words
THE PROCESS COMPRISING THE REACTION OF 1 MOLE OF MALEIC ANHYDRIDE WITH 1 MOLE OF A BENZYL ALKYL ETHER HAVING THE FORMULA:
References Cited (Backward Citations)
US2047398A
Cited
US2121183A
Cited
US2286062A
Cited
US2383399A
Cited
GB668574A
Cited
US2692270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |