US2971024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of alkylating esters
Assignee: Abbott Laboratories
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Filing: 1958-06-18
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Granted: 1961-02-07
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Expires: 1978-06-18
Abstract
No abstract record available.
Inventors
- 👤 Harold E Zaugg
- 👤 Floyd C Garven
- 👤 Adolph O Geiszler
- 👤 Kenneth E Hamlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:28
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/34; C07C69/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF INTRODUCING A RADICAL SELECTED FROM THE GROUP CONSISTING OF LOWERALKYL AND BENZYL INTO AN ESTER SELECTED FROM THE GROUP CONSISTING OF DILOWERALKYL MALONATES, LOWERALKYL ACETOACETATES AND LOWERALKYL CYANOACETATES WHICH COMPRISES REACTING AN ALKALI METAL SALT OF SAID ESTER WITH A MEMBER OF THE GROUP CONSISTING OF LOWERALKYL CHLORIDES, LOWERALKYL BROMIDES, LOWERALKYL IODIDES, BENZYL CHLORIDE, BENZYL BROMIDE, BENZYL IODIDE, DILOWERALKYL SULFATES AND DIBENYLSULFATE IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF TETRAMETHYLUREA, N-FORMYLPYRROLIDINE, TRIMETHYLPHOSPHINE OXIDE, PYRIDINE N-OXIDE, HEXAMETHYLPHOSPHORAMIDE, NFORMYLPIPERIDINE, N-N-DIMETHYLBENZAMIDE, N-METHYLEPSILON-CAPROLACTAM, N-METHYL-2-PIPERIDONE, N-METHYL2-PYRROLIDONE AND N-METHYL-2-PYRIDONE.
Claim 2
Independent Claim
91 words
A METHOD OF INTRODUCING A RADICAL SELECTED FROM THE GROUP CONSISTING OF LOWERALKYL AND BENZYL INTO AN ESTER SELECTED FROM THE GROUP CONSISTING OF DILOWERALKYL MALONATES, LOWERALKYL ACETOACETATES AND LOWERALKYL CYANOACETATES WHICH COMPRISES REACTING AN ALKALI METAL SALT OF SAID ESTER WITH A MEMBER OF THE GROUP CONSISTING OF LOWERALKYL CHLORIDES, LOWERALKYL BROMIDES, LOWERALKYL IODIDES, BENZYL CHLORIDE, BENZYL BROMIDE, BENZYL IODIDE, DILOWERALKYL SULFATES AND DIBENYLSULFATE IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF TETRAMETHYLUREA, N-FORMYLPYRROLIDINE, TRIMETHYLPHOSPHINE OXIDE, PYRIDINE N-OXIDE, HEXAMETHYLPHOSPHORAMIDE, NFORMYLPIPERIDINE, N-N-DIMETHYLBENZAMIDE, N-METHYLEPSILON-CAPROLACTAM, N-METHYL-2-PIPERIDONE, N-METHYL2-PYRROLIDONE AND N-METHYL-2-PYRIDONE.
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) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |