US2952644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming alumina particles
Assignee: Universal Oil Products Co
•
Filing: 1958-02-17
•
Granted: 1960-09-13
•
Expires: 1978-02-17
Abstract
No abstract record available.
Inventors
- 👤 Donald L Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:26
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/021; C01F7/025; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
A METHOD FOR MAKING ALUMINA POWDER INTO LARGE ALUMINA PARTICLES WHICH COMPRISES COMMINGLING ALUMINA POWDER WITH AN ACID WHICH FORMS A HYDROLYZABLE ALUMINUM SALT AND SUFFICIENT WATER TO PRODUCE A DOUGH, THE ACID BEING IN SUFFICIENT AMOUNT TO BIND SAID POWDER, FORMING SAID DOUGH INTO LARGE PARTICLES, DRYING SAID PARTICLES, TREATING THE DRIED PARTICLES WITH A FIXING GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HYDROGEN SULFIDE AND CARBON MONOXIDE AT A TEMPERATURE OF FROM ABOUT 200* TO ABOUT 700*C. FOR A TIME PERIOD OF FROM ABOUT 10 MINUTES TO ABOUT 3 HOURS, AND CALCINING THE RESULTANT FORMED PARTICLES.
Claim 2
Independent Claim
99 words
A METHOD FOR MAKING ALUMINA POWDER INTO LARGE ALUMINA PARTICLES WHICH COMPRISES COMMINGLING ALUMINA POWDER WITH AN ACID WHICH FORMS A HYDROLYZABLE ALUMINUM SALT AND SUFFICIENT WATER TO PRODUCE A DOUGH, THE ACID BEING IN SUFFICIENT AMOUNT TO BIND SAID POWDER, FORMING SAID DOUGH INTO LARGE PARTICLES, DRYING SAID PARTICLES, TREATING THE DRIED PARTICLES WITH A FIXING GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HYDROGEN SULFIDE AND CARBON MONOXIDE AT A TEMPERATURE OF FROM ABOUT 200* TO ABOUT 700*C. FOR A TIME PERIOD OF FROM ABOUT 10 MINUTES TO ABOUT 3 HOURS, AND CALCINING THE RESULTANT FORMED PARTICLES.
Claim 3
Independent Claim
122 words
THE METHOD FOR MAKING LARGE PARTICLES FOR CATALYST WHICH COMPRISES COMINGLING ALUMINA POWDER WITH AN ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC, SULFURIC, NITRIC, ACETIC AND FORMIC ACIDS IN SUFFICIENT AMOUNT TO BIND SAID POWDER AND SUFFICIENT WATER TO PRODUCE A DOUGH, FORMING SAID DOUGH INTO LARGE PARTICLES, DRYING SAID PARTICLES, TREATING THE DRIED PARTICLES WITH A FIXING GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HYDROGEN SULFIDE AND CARBON MONOXIDE AT A TEMPERATURE OF FROM ABOUT 200* TO ABOUT 700*C. FOR A TIME PERIOD OF FROM ABOUT 10 MINUTES TO ABOUT 3 HOURS, CALCINING THE RESULTANT FORMED PARTICLES, IMMERSING THE CALCINED PARTICLES IN A SOLUTION OF A SALT OF A CATALYTIC METAL, EVAPORATING SAID SOLUTION AND OXIDIZING THE RESULTANT COMPOSITE.
Claim 4
Independent Claim
122 words
THE METHOD FOR MAKING LARGE PARTICLES FOR CATALYST WHICH COMPRISES COMINGLING ALUMINA POWDER WITH AN ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC, SULFURIC, NITRIC, ACETIC AND FORMIC ACIDS IN SUFFICIENT AMOUNT TO BIND SAID POWDER AND SUFFICIENT WATER TO PRODUCE A DOUGH, FORMING SAID DOUGH INTO LARGE PARTICLES, DRYING SAID PARTICLES, TREATING THE DRIED PARTICLES WITH A FIXING GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HYDROGEN SULFIDE AND CARBON MONOXIDE AT A TEMPERATURE OF FROM ABOUT 200* TO ABOUT 700*C. FOR A TIME PERIOD OF FROM ABOUT 10 MINUTES TO ABOUT 3 HOURS, CALCINING THE RESULTANT FORMED PARTICLES, IMMERSING THE CALCINED PARTICLES IN A SOLUTION OF A SALT OF A CATALYTIC METAL, EVAPORATING SAID SOLUTION AND OXIDIZING THE RESULTANT COMPOSITE.
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) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |