US2596942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration of oils and waxes with bauxite
Assignee: ExxonMobil Oil Corp
•
Filing: 1949-07-14
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Granted: 1952-05-13
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Expires: 1969-07-14
Abstract
No abstract record available.
Inventors
- 👤 Donald W Robertson
- 👤 Charles F Duchacek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:44
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/003; C10G73/00; C10G73/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THAT METHOD OF REDUCING THE COLOR OF PETROLEUM STOCKS SUCH AS OILS AND WAVES BY FILTRATION WITH BAUXITE IN A STATE OF HYDRATION OBTAINED BY HEATING THE BAUXITE TO A TEMPERATURE OF THE ORDER OF 750% F. FOR A PERIOD OF TWO HOURS AND THEN ADDING THERETO AT LEAST ABOUT 2% BY WEIGHT OF WATER, BASED UPON THE HEATED BAUXITE WEIGHT.
Claim 2
Dependent Claim
61 words
THAT METHOD OF REDUCING THE COLOR OF PETROLEUM STOCKS SUCH AS OILS AND WAVES BY FILTRATION WITH BAUXITE IN A STATE OF HYDRATION OBTAINED BY HEATING THE BAUXITE TO A TEMPERATURE OF THE ORDER OF 750% F. FOR A PERIOD OF TWO HOURS AND THEN ADDING THERETO AT LEAST ABOUT 2% BY WEIGHT OF WATER, BASED UPON THE HEATED BAUXITE WEIGHT.
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) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |