US3283029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic fluids
Assignee: Compagnie Francaise de Raffinage SA
•
Filing: 1963-09-25
•
Granted: 1966-11-01
•
Expires: 1983-09-25
Abstract
No abstract record available.
Inventors
- 👤 Brilland Michel Louis Lucien
- 👤 Tardy Pierre Anthelme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:46
CPC Classifications
C; C10; C10M; C10M107/00; C10M107/02; C10M107/06; C08; C08F; C08F8/00; C08F8/04; C10G; C10G69/00; C10G69/02; C10G69/12; C10G69/126; C10M3/00; C10G2400/00; C10G2400/10; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR PREPPRATION OF STABLE MIXTURES OF SATURATED PETROLEUM HYDROCARBON POLYMERS HAVING LOW FREEZING POINTS AND HIGH BOILING POINTS AND HIGH VISCOSITY INDEXES, SAID MIXTURES BEING SUBSTANTIALLY NON-CORROSIVE TO METALS AND SUBSTANTIALLY INERT TO RUBBERS AND LIKE ELASTOMERS AND BEING PARTICULARLY ADAPTED FOR USE AS HYDRAULIC FLUIDS, WHICH COMPRISES THE STEPS OF SUBJECTING A MIXTURE OF LIGHT OLEFINS TO CATALYTIC POLYMERIZATION TO FORM A MIXTURE OF OLEFINIC POLYMERS SUBSTANTIALLY ALL OF WHICH CONTAIN ABOUT 12 TO 18 CARBON ATOMS PER MOLECULE, SEPRATING FROM SAID MIXTURES OF POLYMERS A FRACTION HAVING A BOILING RANGE OF ABOUT 200* TO 300*C., AND SUBJECTING SAID SEPARATED FRACTION TO CATALYTIC HYDROGENATION UNTIL SAID OLEFINIC POLYMERS HAVE A SUBSTANTIALLY ZERO BROMINE VALUE.
Claim 2
Dependent Claim
117 words
A PROCESS FOR PREPPRATION OF STABLE MIXTURES OF SATURATED PETROLEUM HYDROCARBON POLYMERS HAVING LOW FREEZING POINTS AND HIGH BOILING POINTS AND HIGH VISCOSITY INDEXES, SAID MIXTURES BEING SUBSTANTIALLY NON-CORROSIVE TO METALS AND SUBSTANTIALLY INERT TO RUBBERS AND LIKE ELASTOMERS AND BEING PARTICULARLY ADAPTED FOR USE AS HYDRAULIC FLUIDS, WHICH COMPRISES THE STEPS OF SUBJECTING A MIXTURE OF LIGHT OLEFINS TO CATALYTIC POLYMERIZATION TO FORM A MIXTURE OF OLEFINIC POLYMERS SUBSTANTIALLY ALL OF WHICH CONTAIN ABOUT 12 TO 18 CARBON ATOMS PER MOLECULE, SEPRATING FROM SAID MIXTURES OF POLYMERS A FRACTION HAVING A BOILING RANGE OF ABOUT 200* TO 300*C., AND SUBJECTING SAID SEPARATED FRACTION TO CATALYTIC HYDROGENATION UNTIL SAID OLEFINIC POLYMERS HAVE A SUBSTANTIALLY ZERO BROMINE VALUE.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |