US4151003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscosity modification of bituminous materials
Assignee: Otisca Industries Ltd
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Filing: 1976-03-01
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Granted: 1979-04-24
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Expires: 1996-03-01
Abstract
Abstract Methods of modifying the viscosity of bituminous materials in which a fluoro or chlorofluoro derivative of a lower alkane is mixed therewith, and processes involving and employing products so modified.
Inventors
- 👤 Clay D. Smith
- 👤 Douglas V. Keller, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
94 words
A stable plastic or flowable composition consisting essentially of a viscous bituminous material in stable solution in a non-azetropic, non-flammable, non-toxic viscosity modifier which is a liquid at a temperature of 75° F. and ambient pressure, said viscosity modifier being essentially free of aqueous fluids, emulsifiers, and propellant gases and consisting of trichlorofluoromethane alone or in admixture with at least one of the group consisting of dichlorodifluoromethane, monochlorotrifluoromethane, tetrafluoromethane, monochlorodifluoromethane, trichlorotrifluoroethane, dichlorotetrafluoroethane, and tetrachlorodifluoroethane in an amount effective to produce a reduction in the viscosity of the bituminous material at ambient pressures and temperatures.
Claim 2
Dependent Claim
94 words
A stable plastic or flowable composition consisting essentially of a viscous bituminous material in stable solution in a non-azetropic, non-flammable, non-toxic viscosity modifier which is a liquid at a temperature of 75° F. and ambient pressure, said viscosity modifier being essentially free of aqueous fluids, emulsifiers, and propellant gases and consisting of trichlorofluoromethane alone or in admixture with at least one of the group consisting of dichlorodifluoromethane, monochlorotrifluoromethane, tetrafluoromethane, monochlorodifluoromethane, trichlorotrifluoroethane, dichlorotetrafluoroethane, and tetrachlorodifluoroethane in an amount effective to produce a reduction in the viscosity of the bituminous material at ambient pressures and temperatures.
Claim 3
Dependent Claim
27 words
A composition according to claim 1, in which the viscosity modifier constitutes from 10 to 70 percent by volume based on the total volume of the solution.
Claim 4
Dependent Claim
19 words
A composition according to claim 1, containing a filler in admixture with said bituminous material and said viscosity modifier.
Claim 5
Dependent Claim
26 words
A composition according to claim 1, in which the bituminous material is a crude oil or the organic fraction of a tar sand or oil shale.
Claim 6
Dependent Claim
16 words
A composition according to claim 1, in which the bituminous material is an asphalt or tar.
Claim 7
Dependent Claim
18 words
A composition according to claim 1, which has a viscosity not exceeding about 100 centipoises under ambient conditions.
Claim 8
Independent Claim
107 words
A method of reducing the viscosity of a bituminous material which comprises the step of dissolving said material in a non-azeotropic, non-flammable, non-toxic viscosity modifier which is essentially free of aqueous fluids and propellant gases and is a liquid at a temperature of 75° F. and ambient pressure to produce a stable solution of bituminous material in the viscosity modifier, said viscosity modifier consisting of trichlorofluoromethane alone or in admixture with at least one of the group consisting of dichlorodifluoromethane, monochlorotrifluoromethane, tetrafluoromethane, monochlorodifluoromethane, trichlorotrifluoroethane, dichlorotetrafluoroethane and tetrachlorodifluoroethane in an amount effective to produce a reduction in the viscosity of the bituminous material at ambient pressures and temperatures.
Claim 9
Independent Claim
107 words
A method of reducing the viscosity of a bituminous material which comprises the step of dissolving said material in a non-azeotropic, non-flammable, non-toxic viscosity modifier which is essentially free of aqueous fluids and propellant gases and is a liquid at a temperature of 75° F. and ambient pressure to produce a stable solution of bituminous material in the viscosity modifier, said viscosity modifier consisting of trichlorofluoromethane alone or in admixture with at least one of the group consisting of dichlorodifluoromethane, monochlorotrifluoromethane, tetrafluoromethane, monochlorodifluoromethane, trichlorotrifluoroethane, dichlorotetrafluoroethane and tetrachlorodifluoroethane in an amount effective to produce a reduction in the viscosity of the bituminous material at ambient pressures and temperatures.
Claim 10
Dependent Claim
32 words
A method according to claim 7, in which the bituminous material is dissolved in from 10 to 70 percent by volume of viscosity modifier based on the total volume of the solution.
Claim 11
Dependent Claim
21 words
A method according to claim 7, together with the step of mixing a filler with said bituminous material and viscosity modifier.
Claim 12
Dependent Claim
26 words
A method according to claim 7, in which the bituminous material is a crude oil on the organic fraction of a tar sand or oil shale.
Claim 13
Dependent Claim
16 words
A method according to claim 7, in which the bituminous material is an asphalt or tar.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |