US2698305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for controlling pore size
Assignee: ExxonMobil Oil Corp
•
Filing: 1951-03-23
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Granted: 1954-12-28
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Expires: 1971-03-23
Abstract
No abstract record available.
Inventors
- 👤 Charles J Plank
- 👤 Sigmund J Lukasiewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:40
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A METHOD FOR MODIFYING THE POROSITY OF A POROUS HYDROUS OXIDE COMPOSITION WITHOUT EFFECTING APPRECIABLE CHANGE IN THE DENSITY THEREOF, COMPRISING CONTACTING A SUBSTANTALLY DRY POROUS HYDROUS OXIDE COMPOSITION WITH TION OF 50 97%, AN INORGANIC VANADATE COMPOUND ABOUT 900* F. AND PRESSURE BETWEEN ABOUT 100 AND ABOUT 300 POUNDS PER SQUARE INCH FOR A PERIOD OF BETWEEN ABOUT 15 MINUTES AND 6 HOURS.
Claim 2
Independent Claim
64 words
A METHOD FOR MODIFYING THE POROSITY OF A POROUS HYDROUS OXIDE COMPOSITION WITHOUT EFFECTING APPRECIABLE CHANGE IN THE DENSITY THEREOF, COMPRISING CONTACTING A SUBSTANTALLY DRY POROUS HYDROUS OXIDE COMPOSITION WITH TION OF 50 97%, AN INORGANIC VANADATE COMPOUND ABOUT 900* F. AND PRESSURE BETWEEN ABOUT 100 AND ABOUT 300 POUNDS PER SQUARE INCH FOR A PERIOD OF BETWEEN ABOUT 15 MINUTES AND 6 HOURS.
References Cited (Backward Citations)
US2378155A
Cited
US2420049A
Cited
US2489334A
Cited
US2495723A
Cited
US2477664A
Cited
US2477695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |