Patent US4424386A successfully refreshed from Google Patents.
US4424386A
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Methylchloroform stabilizer compositions employing thiazolidine
Assignee: Dow Chemical Co
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Filing: 1981-09-10
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Granted: 1984-01-03
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Expires: 2001-09-10
Abstract
Abstract Metal corrosion in the presence of methylchloroform is inhibited when thiazolidine is added to the methylchloroform. The inhibitor is useful in degreasing processes and may be used in combination with other known inhibitors.
Inventors
- 👤 Nobuyuki Ishibe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:57
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C17/42
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
21 words
A stabilized methylchloroform composition consisting essentially of methylchloroform, a stabilizing amount of thiazolidine and, optionally, a stabilizing amount of a nitroalkane.
Claim 2
Dependent Claim
21 words
A stabilized methylchloroform composition consisting essentially of methylchloroform, a stabilizing amount of thiazolidine and, optionally, a stabilizing amount of a nitroalkane.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein the nitroalkane contains from one to three carbon atoms.
Claim 4
Dependent Claim
45 words
The composition of claim 2 wherein the thiazolidine is present in an amount of from about 0.5 to about 5 percent and the nitroalkane is present in an amount of from about 1 to about 5 percent based on the total volume of the composition.
Claim 5
Dependent Claim
10 words
The composition of claim 3 wherein the nitroalkane is nitromethane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |