US4040956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic flush fluids
Assignee: Gulf Research and Development Co
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Filing: 1976-06-07
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Granted: 1977-08-09
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Expires: 1996-06-07
Abstract
Abstract A process for disposing of sewage in a synthetic flush fluid recycle toilet facility. Sewage is deposited in a recirculating sanitary system charged with a synthetic flush fluid and is periodically separated and transferred for disposition. The flush fluid is filtered, sanitized, deodorized and recycled for future use.
Inventors
- 👤 Charles M. Selwitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:34
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/016; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/916
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
In a process for disposing of sewage in which a synthetic flush fluid receives the sewage, carries the sewage to apparatus for disposition thereof and is recirculated to receive additional sewage, the improvement which comprises a cyclohexylalkane synthetic flush fluid wherein the alkane carbon chain is selected from straight or branched chain alkyl moieties having from 12 to 14 carbon atoms; and wherein said cyclohexylalkane is selected from the group of cyclohexyldodecane; cyclohexltridecane; cyclohexyltetradecane; cyclohexyl-methyl-dodecane; cyclohexyl-methyl-tridecane; and mixtures thereof, said flush fluid having a viscosity of up to about 10 centistokes at 100° F., a pour point of about 0° F. or lower, an aniline point of at least about 170° F., a flash point of at least about 325° F., and a density of from about 0.75 to about 0.90 at 60° F.
Claim 2
Dependent Claim
134 words
In a process for disposing of sewage in which a synthetic flush fluid receives the sewage, carries the sewage to apparatus for disposition thereof and is recirculated to receive additional sewage, the improvement which comprises a cyclohexylalkane synthetic flush fluid wherein the alkane carbon chain is selected from straight or branched chain alkyl moieties having from 12 to 14 carbon atoms; and wherein said cyclohexylalkane is selected from the group of cyclohexyldodecane; cyclohexltridecane; cyclohexyltetradecane; cyclohexyl-methyl-dodecane; cyclohexyl-methyl-tridecane; and mixtures thereof, said flush fluid having a viscosity of up to about 10 centistokes at 100° F., a pour point of about 0° F. or lower, an aniline point of at least about 170° F., a flash point of at least about 325° F., and a density of from about 0.75 to about 0.90 at 60° F.
Claim 3
Dependent Claim
21 words
The process according to claim 1 wherein said synthetic flush fluid contains up to about 2.0 weight percent of a bacteriostat.
Claim 4
Dependent Claim
30 words
The process of claim 2 wherein said synthetic flush fluid contains a bacteriostat selected from the group of bisphenol A; 3,4,5-tribromosalicylanilide; hexachlorobenzene, 3,4,4-trichlorocarbanilide; hexadecylphridinum chloride; tetramethylthiuram disulfide, and mixtures thereof.
Claim 5
Dependent Claim
21 words
The process according to claim 1 wherein said synthetic flush fluid contains up to about 5.0 weight percent of a deodorant.
Claim 6
Dependent Claim
73 words
The process of claim 4 wherein said synthetic flush fluid contains a deodorant selected from the group of linalool, geranoil, coumarin, acetophenone, salicyl alcohol, vanillin, salicylaldehyde, 3-methylcyclopentadecanone, methyl octine carbonate, styrallyl acetate, oil of cedarwood, oil of cedarleef, oil of lavender, oil of pentigram, oil of lemongrass, lemon oil, oil of rosemary, oil of rose, oil of pine, oil of cashmere, oil of musk, oil of tangerine, oil of bergamol, and mixtures thereof.
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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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |