US3057877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 2-(1, 1-dimethyl-2-hydroxy-ethyl)-5, 5-dimethyl-1, 3-dioxane
Assignee: Nopco Chemical Co
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Filing: 1959-11-06
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Granted: 1962-10-09
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Expires: 1979-11-06
Abstract
No abstract record available.
Inventors
- 👤 Howard C Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:13
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/04; C07D319/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR PRODUCING 2-(1,1-DIMETHYL-2-HYDROXYEHTYL)-5,5-DIMETHYL-1,3-DIOXANE FROM CRUDE PANTOYL LACTONE CONTAINING SAID DIOXANE WHICH COMPRISES FIRST ADJUSTING THE PH OF SAID CRUDE LACTONE WITH AN AQUEOUS ALKALI SOLUTION TO A PH OF CRUDE LACTONE WITH AN AQUEOUS ADDING THE RESULTANT ADJUSTED MIXTURE TO A WATER-IMMISCIBLE ORGNAIC SOLVENT IN WHICH SAID PANTOYL LACTONE IS SOLUBLE AND FURTHER ADDING AN AQUEOUS ALKALI SOLUTION TO THE WATER--IMMISCIBLE ORGANIC SOLVENT TO FORM A TWOPHASE SYSTEM WITH THE AQUEOUS ALKALI SOLUTION, SEPARATING THE WATER-IMMISCIBLE ORGANIC SOLVENT PHASE FROM THE AQUEOUS PHASE, AND RECOVERING THE 2-(1,1-DIMETHYL-2-HYDROXY-ETHYL)-5,5-DIMETHYL-1,3-DIOXANE PRODUCT FROM THE ORGANIC PHASE.
Claim 2
Dependent Claim
94 words
A PROCESS FOR PRODUCING 2-(1,1-DIMETHYL-2-HYDROXYEHTYL)-5,5-DIMETHYL-1,3-DIOXANE FROM CRUDE PANTOYL LACTONE CONTAINING SAID DIOXANE WHICH COMPRISES FIRST ADJUSTING THE PH OF SAID CRUDE LACTONE WITH AN AQUEOUS ALKALI SOLUTION TO A PH OF CRUDE LACTONE WITH AN AQUEOUS ADDING THE RESULTANT ADJUSTED MIXTURE TO A WATER-IMMISCIBLE ORGNAIC SOLVENT IN WHICH SAID PANTOYL LACTONE IS SOLUBLE AND FURTHER ADDING AN AQUEOUS ALKALI SOLUTION TO THE WATER--IMMISCIBLE ORGANIC SOLVENT TO FORM A TWOPHASE SYSTEM WITH THE AQUEOUS ALKALI SOLUTION, SEPARATING THE WATER-IMMISCIBLE ORGANIC SOLVENT PHASE FROM THE AQUEOUS PHASE, AND RECOVERING THE 2-(1,1-DIMETHYL-2-HYDROXY-ETHYL)-5,5-DIMETHYL-1,3-DIOXANE PRODUCT FROM THE ORGANIC PHASE.
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) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |