Patent US4365600A successfully refreshed from Google Patents.
US3900524A
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Stabilized methylene chloride
Assignee: OCCIDENTIAL ELECTROCHEMICALS Corp
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Filing: 1974-05-13
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Granted: 1975-08-19
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Expires: 1994-05-13
Abstract
Abstract Methylene chloride stabilized by admixture with diisopropylamine, N-methyl pyrrole, butylene oxide and propylene oxide. The composition is useful in metal degreasing.
Inventors
- 👤 Norman L Beckers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:04
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02854; C23G5/02883; C23G5/0289; C07; C07C; C07C17/00; C07C17/38; C07C17/42
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
29 words
A STABILIZED COMPOSITION CONSISTING ESSENTIALLY OF METHYLENE CHLORIDE AND FROM ABOUT 0.001 TO ABOUT 2.0 PERCENT BY WEIGHT OF EACH OF DIISOPROPYLAMINE, N-METHYL PYRROLE, BUTYLENE OXIDE AND PROPYLENE OXIDE.
Claim 2
Dependent Claim
29 words
A STABILIZED COMPOSITION CONSISTING ESSENTIALLY OF METHYLENE CHLORIDE AND FROM ABOUT 0.001 TO ABOUT 2.0 PERCENT BY WEIGHT OF EACH OF DIISOPROPYLAMINE, N-METHYL PYRROLE, BUTYLENE OXIDE AND PROPYLENE OXIDE.
Claim 3
Dependent Claim
27 words
The composition of claim 1 wherein diisopropylamine, N-methyl pyrrole, butylene oxide, and propylene oxide are each present in the range of 0.002 to 1.0 percent by weight.
References Cited (Backward Citations)
US2981759A
Cited
US3314892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |