Patent US2667516A successfully refreshed from Google Patents.
US2667516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making chloromethyl
Assignee: —
•
Filing: —
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Granted: 1954-01-26
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Expires: 1971-01-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:05
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/12; C07C43/123; C07C41/00; C07C41/01; C07C41/18; C07C41/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN A METHOD OF MAKING CHLOROMETHYL METHYL ETHER WHEREIN A SOLUTION CONTAINING APPROXIMATELY EQUIMOLECULAR PROPORTIONS OF FORMALDEHYDE AND METHYL ALCOHOL IS SUBSTANTIALLY SATURATED WITH HYDROGEN CHLORIDE AT TEMPERATURES BETWEEN 0* AND 60* C. AND THE CHLOROMETHYL METHYL ETHER PRODUCT IS SEPARATED AS A LIQUID ORGANIC LAYER FROM THE LIQUID AQUEOUS PHASE OF THE REACTION MIXTURE, THE IMPROVEMENT WHICH CONSISTS IN HEATING THE LIQUID AQUEOUS PHASE OF THE REACTION MIXTURE TO DISTILL VOLATILE COMPONENTS, TOGETHER WITH A PORTION OF THE WATER AND LEAVE AN AQUEOUS RESIDUE CONTAINING APPROXIMATELY 20 PERCENT BY WEIGHT OF HYDROCHLORIC ACID, MIXING THE DISTILLATE WITH A FURTHER QUANTITY OF THE ABOVE-MENTIONED STARTING MATERIALS IN THE PROPORTIONS GIVEN, AND REPEATING THE PROCESS AS JUST DESCRIBED.
Claim 2
Dependent Claim
117 words
IN A METHOD OF MAKING CHLOROMETHYL METHYL ETHER WHEREIN A SOLUTION CONTAINING APPROXIMATELY EQUIMOLECULAR PROPORTIONS OF FORMALDEHYDE AND METHYL ALCOHOL IS SUBSTANTIALLY SATURATED WITH HYDROGEN CHLORIDE AT TEMPERATURES BETWEEN 0* AND 60* C. AND THE CHLOROMETHYL METHYL ETHER PRODUCT IS SEPARATED AS A LIQUID ORGANIC LAYER FROM THE LIQUID AQUEOUS PHASE OF THE REACTION MIXTURE, THE IMPROVEMENT WHICH CONSISTS IN HEATING THE LIQUID AQUEOUS PHASE OF THE REACTION MIXTURE TO DISTILL VOLATILE COMPONENTS, TOGETHER WITH A PORTION OF THE WATER AND LEAVE AN AQUEOUS RESIDUE CONTAINING APPROXIMATELY 20 PERCENT BY WEIGHT OF HYDROCHLORIC ACID, MIXING THE DISTILLATE WITH A FURTHER QUANTITY OF THE ABOVE-MENTIONED STARTING MATERIALS IN THE PROPORTIONS GIVEN, AND REPEATING THE PROCESS AS JUST DESCRIBED.
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) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |