US4062901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the stabilization of methylene chloride
Assignee: Solvay SA
•
Filing: 1973-03-30
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Granted: 1977-12-13
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Expires: 1993-03-30
Abstract
Abstract Stabilized methylene chloride and process for stabilizing methylene chloride against its decomposition by supplying thereto 2-methylfuran and one or more expoxides.
Inventors
- 👤 Jacques Lolivier
- 👤 Andre Ryckaert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:11
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02854; C23G5/02861; C23G5/0288; C07; C07C; C07C17/00; C07C17/38; C07C17/42; C09; C09K; C09K3/00; C09K3/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
14 words
A methylene chloride composition containing stabilizing quantities of 2-methylfuran and one or more epoxides.
Claim 2
Dependent Claim
14 words
A methylene chloride composition containing stabilizing quantities of 2-methylfuran and one or more epoxides.
Claim 3
Dependent Claim
23 words
The composition according to claim 1 wherein the total amount of stabilizers is between 0.05 and 10% by weight of the methylene chloride.
Claim 4
Dependent Claim
23 words
The composition according to claim 2 wherein the total amount of stabilizers is between 0.1 and 5% by weight of the methylene chloride.
Claim 5
Dependent Claim
12 words
The composition according to claim 1 wherein the epoxide is epoxy butane.
Claim 6
Dependent Claim
11 words
The composition according to claim 1 wherein the epoxide is glycidol.
Claim 7
Dependent Claim
12 words
The composition according to claim 1 and further containing an acetylene alcohol.
Claim 8
Dependent Claim
12 words
The composition according to claim 6 wherein the acetylene alcohol is butyn-1,4-diol.
Claim 9
Dependent Claim
25 words
The composition according to claim 1 wherein the epoxides are those containing 2 to 8 carbon atoms substituted or not by halogens or hydroxyl groups.
Claim 10
Dependent Claim
43 words
The composition according to claim 1 wherein the total amount of stabilizers is between 0.05 and 10% by weight of the methylene chloride and wherein the epoxides are those containing 2 to 8 carbon atoms substituted or not by halogens or hydroxyl groups.
References Cited (Backward Citations)
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US3260760A
Cited
US3326989A
Cited
US3406213A
Cited
US3423476A
Cited
US3546304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |