Patent US2982719A successfully refreshed from Google Patents.
US2982719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of hydrous oxides
Assignee: Gulf Research and Development Co
•
Filing: 1955-09-30
•
Granted: 1961-05-02
•
Expires: 1975-09-30
Abstract
No abstract record available.
Inventors
- 👤 William I Gilbert
- 👤 William A Pardee
- 👤 Charles W Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:12
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/08; B01J37/10; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
A METHOD FOR MODIFYING THE PORE STRUCTURE OF A POROUS HYDROUS OXIDE COMPOSITION WITHOUT EFFECTING APPRECIABLE CHANGE IN THE DENSITY THEREOF, COMPRISING CONTACTING A SUBSTANTIALLY DRY POROUS HYDROUS OXIDE COMPOSITION WITH WATER VAPOR AT A TEMPERATURE IN THE RANGE AND ABOUT 1500 POUNDS PER SQUARE INCH FOR A PEROD OF AT LEAST ONE HOUR.
Claim 2
Independent Claim
54 words
A METHOD FOR MODIFYING THE PORE STRUCTURE OF A POROUS HYDROUS OXIDE COMPOSITION WITHOUT EFFECTING APPRECIABLE CHANGE IN THE DENSITY THEREOF, COMPRISING CONTACTING A SUBSTANTIALLY DRY POROUS HYDROUS OXIDE COMPOSITION WITH WATER VAPOR AT A TEMPERATURE IN THE RANGE AND ABOUT 1500 POUNDS PER SQUARE INCH FOR A PEROD OF AT LEAST ONE HOUR.
Claim 3
Dependent Claim
50 words
A PROCESS FOR THE CONVERSION OF A HIGH MOLECULAR WEIGHT HYDROCARBON UNDER CATALYTIC CRACKING CONDITIONS WITH A SILICA-ALUMINIA CRACKING CATALYST TREATED BY SUBJECTING THE CATALYST TO STREAM AT A TEMPERATURE IN THE OF ABOUT 75 TO 1500 P.S.I. TO CONVERT SAID HIGH MOLECULAR WEIGHT HYDROCARBONS TO LOWER MOLECULAR WEIGHT HYDROCARBONS.
Claim 4
Dependent Claim
50 words
A PROCESS FOR THE CONVERSION OF A HIGH MOLECULAR WEIGHT HYDROCARBON UNDER CATALYTIC CRACKING CONDITIONS WITH A SILICA-ALUMINIA CRACKING CATALYST TREATED BY SUBJECTING THE CATALYST TO STREAM AT A TEMPERATURE IN THE OF ABOUT 75 TO 1500 P.S.I. TO CONVERT SAID HIGH MOLECULAR WEIGHT HYDROCARBONS TO LOWER MOLECULAR WEIGHT HYDROCARBONS.
References Cited (Backward Citations)
US2375757A
Cited
US2698305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |