US3573213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotrope of 1,1,2-trichloro-1,2,2-trifluoroethane and nitromethane
Assignee: EIDP Inc
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Filing: 1968-01-18
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Granted: 1971-03-30
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Expires: 1988-01-18
Abstract
Abstract AN AZEOTROPE OF ABOUT 97.1 WEIGHT PERCENT 1,1,2-TRICHLORO-1,2,2-TRIFLUOROETHANE AND ABOUT 2.9 WEIGHT PERCENT NITROMETHANE, USEFUL IN VAPOR DEGREASING AND CLEANING APPLICATIONS. THE PRESENCE OF NITROMETHANE INHIBITS REACTION OF THE 1,1,2-TRICHLORO-1,2,2-TRIFLUOROETHANE WITH ZINC TO PRODUCE UNSATURATED HALOCARBONS AND INHIBITS ALUMINUM CORROSION AS WELL AS STRESS-CORROSION CRACKING OF TITANIUM ALLOYS. MIXTURES WHEREIN THE NITROMETHANE IS PRESENT IN GREATER THAN AZEOTROPIC AMOUNTS ARE FLAMMABLE; WHILE MIXTURES WHEREIN THE NITROMETHANE IS MUCH LESS THAN AZEOTROPIC AMOUNTS ARE NOT AS EFFECTIVE WITH RESPECT TO MOST OF THE INHIBITING PROPERTIES OF THE AZEOTROPE.
Inventors
- 👤 James G Burt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:43
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02812; C23G5/02816; C23G5/02819; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5095
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |