Patent US2852438A successfully refreshed from Google Patents.
US2852438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid-clay treatment of petroleum fractions using centrifugal force
Assignee: Sunoco Inc
•
Filing: 1956-03-02
•
Granted: 1958-09-16
•
Expires: 1976-03-02
Abstract
No abstract record available.
Inventors
- 👤 Fear James Van Dyck
- 👤 Jr Frank R Shuman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:14
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/06; Y; Y10; Y10S; Y10S494/00; Y10S494/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS FOR REFINING PERTOLEUM FRACTION S WHICH COMPRISES CONTIBOUSLY PASSING A PETROLEUM FRACTION CONTAINING IMPURITIES REMOVABLE BY THE ACTION OF ACID AND ADSORBENT MATERIAL TO THE INTERIOR OF A ROTATING CENTRIFUGE WHEEL AT A POINT NEAR THE PREIPHERY THEREOF, CONTINUOUSLY INTRODUCTING ACID TO THE INTERIOR OF THE CERTIFUGE WHEEL AT A POINT NEARER TO THE HUB OF THE CENTRIFUGE WHEEL THAN THE POINT OF INTRODUCTION OF THE PERTOLEUM FRACTION, CONTINOUSLY INTRODUCTING AN ADSORBENT MATERIAL TO THE INTERIOR OF THE CENTRIFUGE AT A POINT SPACED FROM THE HUB THEREOF, BUT NEARER TO THE HUB THAN THE POINT OF INTRODUCTION OF ACID, CONTINUOUSLY WITHDRAWING A PURIFIED HYDROCARBON FRACTION FROM THE INTERIOR OF THE CENTRIFUGE WHEEL AT A POINT CLOSER TO THE
Claim 2
Dependent Claim
120 words
A PROCESS FOR REFINING PERTOLEUM FRACTION S WHICH COMPRISES CONTIBOUSLY PASSING A PETROLEUM FRACTION CONTAINING IMPURITIES REMOVABLE BY THE ACTION OF ACID AND ADSORBENT MATERIAL TO THE INTERIOR OF A ROTATING CENTRIFUGE WHEEL AT A POINT NEAR THE PREIPHERY THEREOF, CONTINUOUSLY INTRODUCTING ACID TO THE INTERIOR OF THE CERTIFUGE WHEEL AT A POINT NEARER TO THE HUB OF THE CENTRIFUGE WHEEL THAN THE POINT OF INTRODUCTION OF THE PERTOLEUM FRACTION, CONTINOUSLY INTRODUCTING AN ADSORBENT MATERIAL TO THE INTERIOR OF THE CENTRIFUGE AT A POINT SPACED FROM THE HUB THEREOF, BUT NEARER TO THE HUB THAN THE POINT OF INTRODUCTION OF ACID, CONTINUOUSLY WITHDRAWING A PURIFIED HYDROCARBON FRACTION FROM THE INTERIOR OF THE CENTRIFUGE WHEEL AT A POINT CLOSER TO THE
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |