US3904542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotropic composition of fluorocarbon
Assignee: Phillips Petroleum Co
•
Filing: 1973-03-06
•
Granted: 1975-09-09
•
Expires: 1993-03-06
Abstract
Abstract Constant boiling admixtures are formed with 1,2-dichloro-1fluoroethane, acetone, and methanol.
Inventors
- 👤 Robert E Reusser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:25
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5086; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/149; C09; C09D; C09D9/00; C09D9/005; C09K; C09K3/00; C09K3/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
37 words
A SUBSTANTIALLY CONSTANT BOILING ADMIXTURE OF (A) 1, 2DICHLORO-1-FLUOROETHANE, (B) ACETONE, AND (C) METHANOL, CHARACTERIZED BY A WEIGHT PERCENT RATIO OF ABOUT 25 TO 41 (A), ABOUT 25 TO 33 (B), AND ABOUT 26 TO 40 METHANOL.
Claim 2
Dependent Claim
37 words
A SUBSTANTIALLY CONSTANT BOILING ADMIXTURE OF (A) 1, 2DICHLORO-1-FLUOROETHANE, (B) ACETONE, AND (C) METHANOL, CHARACTERIZED BY A WEIGHT PERCENT RATIO OF ABOUT 25 TO 41 (A), ABOUT 25 TO 33 (B), AND ABOUT 26 TO 40 METHANOL.
Claim 3
Dependent Claim
25 words
The substantially constant boiling admixture according to claim 2 characterized by a boiling point of about 59* to 61* C. at about 761 millimeters mercury.
Claim 4
Dependent Claim
33 words
The substantially constant boiling admixture according to claim 3 further characterized by a weight percent ratio of about 40 to 41 (A), about 32 to 33 (B), and about 26 to 28 (C).
Claim 5
Dependent Claim
42 words
A ternary azeotrope of 1,2-dichloro-1-fluoroethane, acetone, and methanol characterized by a weight percent composition of about 39.6 weight percent 1,2-dichloro-1-fluoroethane, 32 weight percent acetone, and 28.4 weight percent methanol at a boiling point of about 59* C. at about 761 mm Hg.
Claim 6
Dependent Claim
42 words
A ternary azeotrope of 1,2-dichloro-1-fluoroethane, acetone, and methanol characterized by a weight percent composition of about 39.6 weight percent 1,2-dichloro-1-fluoroethane, 32 weight percent acetone, and 28.4 weight percent methanol at a boiling point of about 59* C. at about 761 mm Hg.
Claim 7
Dependent Claim
39 words
A ternary azeotrope of 1,2-dichloro-1-fluoroethane, acetone, and methanol characterized by a weight percent composition of about 40.9 percent 1,2-dichloro-1-fluoroethane, 32.8 percent acetone, and 26.2 percent methanol at a boiling point of about 60* C. at about 761 mm Hg.
Claim 8
Dependent Claim
39 words
A ternary azeotrope of 1,2-dichloro-1-fluoroethane, acetone, and methanol characterized by a weight percent composition of about 40.9 percent 1,2-dichloro-1-fluoroethane, 32.8 percent acetone, and 26.2 percent methanol at a boiling point of about 60* C. at about 761 mm Hg.
Claim 9
Dependent Claim
39 words
A ternary azeotrope of 1,2-dichloro-1-fluoroethane, acetone, and methanol characterized by a weight percent composition of about 39.2 percent 1,2-dichloro-1-fluoroethane, 25.6 percent acetone, and 28.5 percent methanol at a boiling point of about 61* C. at about 761 mm Hg.
Claim 10
Dependent Claim
39 words
A ternary azeotrope of 1,2-dichloro-1-fluoroethane, acetone, and methanol characterized by a weight percent composition of about 39.2 percent 1,2-dichloro-1-fluoroethane, 25.6 percent acetone, and 28.5 percent methanol at a boiling point of about 61* C. at about 761 mm Hg.
References Cited (Backward Citations)
US3554918A
Cited
US3728268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |