Patent US3681008A successfully refreshed from Google Patents.
Patent US3301778A successfully refreshed from Google Patents.
US3301778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractional distillation
Assignee: Phillips Petroleum Co
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Filing: 1964-06-15
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Granted: 1967-01-31
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Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 John T Cabbage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:55
CPC Classifications
C; C10; C10G; C10G7/00; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A METHOD FOR FRACTIONAL DISTILLATION OF CRUDE OIL COMPRISING FEEDING CRUDE OIL INTO A FRACTIONATOR NEAR THE BOTTOM THEREOF, INJECTING STEAM INTO THE BOTTOM OF SAID FRACTIONATOR TO PRODUCE A TOPPED CRUDE FRACTION, INTERMEDIATE DISTILLATES AND LIGHT DISTILLATES, WITHDRAWING SAID TOPPED CRUDE FRACTION FROM THE BOTTOM OF SAID FRACTIONATOR, MIXING STEAM WITH SAID TOPPED CRUDE FRACTION TO PRODUCE A TOPPED CRUDE-STEAM MIXTURE, STEAM STRIPPING SAID TOPPED CRUDE-STEAM MISTURE TO PRODUCE A GAS OILSTEAM MIXTURE, RETURNING SAID GAS OIL-STREAM MIXTURE TO A POINT ON THE FRACTIONATOR JUST BELOW THE POINT WHERE THE CRUDE OIL ENTERS THE FRACTIONATOR, CONTEMPORANEOUSLY WITH THE ABOVE REMOVING AT LEAST ONE OF SAID INTERMEDIATE DISTILLATES FROM A PLATE IN SAID FACTIONATOR, PASSING SAID INTERMEDIATE DISTILLATE TO A VACUUM STRIPPER, MAINTAINING A SUBATMOSPHERE PRESSURE IN SAID VACCUM STRIPPER BY USE OF A STEAM EDUCATOR, CONTROLLING THE FLOW OF INTERMEDIATE DISTILLATE FROM SAID FRACTIONATOR TO SAID VACUUM STRIPPER BY THE LEVEL OF LIQUID IN SAID VACUUM STRIPPER, PASSING THE OVERHEAD FROM SAID VACUUM STRIPPER TO SAID STEAM EDUCATOR AND THEN PASSING THE OVERHEAD-STEAM MIXTURE TO SAID FRACTIONATOR IN THE VICINITY OF THE PLATE FROM
Claim 2
Independent Claim
185 words
A METHOD FOR FRACTIONAL DISTILLATION OF CRUDE OIL COMPRISING FEEDING CRUDE OIL INTO A FRACTIONATOR NEAR THE BOTTOM THEREOF, INJECTING STEAM INTO THE BOTTOM OF SAID FRACTIONATOR TO PRODUCE A TOPPED CRUDE FRACTION, INTERMEDIATE DISTILLATES AND LIGHT DISTILLATES, WITHDRAWING SAID TOPPED CRUDE FRACTION FROM THE BOTTOM OF SAID FRACTIONATOR, MIXING STEAM WITH SAID TOPPED CRUDE FRACTION TO PRODUCE A TOPPED CRUDE-STEAM MIXTURE, STEAM STRIPPING SAID TOPPED CRUDE-STEAM MISTURE TO PRODUCE A GAS OILSTEAM MIXTURE, RETURNING SAID GAS OIL-STREAM MIXTURE TO A POINT ON THE FRACTIONATOR JUST BELOW THE POINT WHERE THE CRUDE OIL ENTERS THE FRACTIONATOR, CONTEMPORANEOUSLY WITH THE ABOVE REMOVING AT LEAST ONE OF SAID INTERMEDIATE DISTILLATES FROM A PLATE IN SAID FACTIONATOR, PASSING SAID INTERMEDIATE DISTILLATE TO A VACUUM STRIPPER, MAINTAINING A SUBATMOSPHERE PRESSURE IN SAID VACCUM STRIPPER BY USE OF A STEAM EDUCATOR, CONTROLLING THE FLOW OF INTERMEDIATE DISTILLATE FROM SAID FRACTIONATOR TO SAID VACUUM STRIPPER BY THE LEVEL OF LIQUID IN SAID VACUUM STRIPPER, PASSING THE OVERHEAD FROM SAID VACUUM STRIPPER TO SAID STEAM EDUCATOR AND THEN PASSING THE OVERHEAD-STEAM MIXTURE TO SAID FRACTIONATOR IN THE VICINITY OF THE PLATE FROM
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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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |