Patent US3676507A successfully refreshed from Google Patents.
US3676507A
Expired / Lapsed
US
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Stabilized trichloroethylene
Assignee: Imperial Chemical Industries Ltd
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Filing: 1970-02-20
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Granted: 1972-07-11
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Expires: 1990-02-20
Abstract
Abstract A phenol which carries at least one substituent in an ortho position with respect to a hydroxy-group and phenol itself or a substituted phenol which carries no substituent in an ortho position with respect to a hydroxy-group are used as synergistically co-operative inhibitors of oxidation of trichloroethylene.
Inventors
- 👤 Alastair Campbell
- 👤 Peter Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:27
CPC Classifications
D; D06; D06L; D06L1/00; D06L1/02; D06L1/04; C; C07; C07C; C07C17/00; C07C17/38; C07C17/42; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02854; C23G5/02861; C23G5/02864; C23G5/0287
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A composition according to claim 1, wherein the amount of each of the said phenols is in the range 0.01-0.1 percent by weight of the trichloroethylene.
Claim 2
Dependent Claim
18 words
A composition according to claim 1, wherein the amounts of each of the said phenols are approximately equal.
References Cited (Backward Citations)
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |