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US4655958A
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Liquid-water displacement composition of a chlorofluorocarbon compound and a phosphate salt surfactant
Assignee: Akzo America Inc
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Filing: 1986-01-07
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Granted: 1987-04-07
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Expires: 2006-01-07
Abstract
Abstract Liquid-water displacement compositions containing a normally liquid chlorofluorocarbon compound with a surfactant comprising a tetraalkyl ammonium compound derived from an aryl acid phosphate are described. They are useful in aiding in the substantially complete removal of water from the surface of metals.
Inventors
- 👤 Alfred K. Jung
- 👤 Edward D. Weil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:44
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/38; C11D1/62; C11D1/02; C11D1/34; C11D1/345; C11D3/00; C11D3/43; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
54 words
A liquid-water displacement composition consisting essentially of a normally liquid chlorofluorocarbon compound and, as a surfactant, a tetraalkylammonium salt of an aryl acid phosphate or alkyl substituted aryl acid phosphate wherein the tetraalkylammonium moiety has two or three C 6 -C 18 alkyl groups and one or two C 1 -C 2 alkyl groups.
Claim 2
Dependent Claim
54 words
A liquid-water displacement composition consisting essentially of a normally liquid chlorofluorocarbon compound and, as a surfactant, a tetraalkylammonium salt of an aryl acid phosphate or alkyl substituted aryl acid phosphate wherein the tetraalkylammonium moiety has two or three C 6 -C 18 alkyl groups and one or two C 1 -C 2 alkyl groups.
Claim 3
Dependent Claim
26 words
A composition as claimed in claim 1 wherein the chlorofluorocarbon compound has at least two carbon atoms and a boiling point of at least 28° C.
Claim 4
Dependent Claim
30 words
A composition as claimed in claim 1 wherein the aryl acid phosphate is at least one of the following orthophosphates: (RO)(OH)P(O)OR (RO)P(O)(OH).sub.2 with R being aryl or alkyl substituted aryl.
Claim 5
Dependent Claim
30 words
A composition as claimed in claim 1 wherein the aryl acid phosphate is at least one of following pyrophosphates: (RO)(OH)P(O)OP(O)(OR).sub.2 (RO)(OH)P(O)OP(O)(OR)(OH) (RO)(OH)P(O)OP(O)(OH).sub.2 with R being aryl or alkyl substituted aryl.
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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) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |