US2693017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing lightweight aggregates
Assignee: Ohio State University Research Foundation
•
Filing: 1951-04-19
•
Granted: 1954-11-02
•
Expires: 1971-04-19
Abstract
No abstract record available.
Inventors
- 👤 Kamil B Czarnecki
- 👤 George A Bole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:09
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/02; C04B20/04; C04B20/06; C04B20/068; Y; Y10; Y10S; Y10S264/00; Y10S264/39; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
A PROCESS OF PRODUCING LIGHTWEIGHT AGGREGATE WHICH COMPRISES THE STEPS OF ADDING A CRUDE HYDROCARBON OIL TO DRY CLAY-LIKE MATERIALS HAVING MORE THAN 50% COMBINED SILICA AND ALUMINA BY WEIGHT; SUBSEQUENTLY ADDING WATER TO SAID MATERIAL OF THE ORDER OF ABOUT 15 TO 25 PARTS OF WATER BY WEIGHT TO 100 PARTS OF THE RAW MATERIAL; SUBSEQUENTLY FORMING THE MIXTURE INTO SUBSTANTIALLY ROUNDED PELLETS; AND SUBSEQUENTLY CAUSING THE PELLETS TO SWELL BY HEATING THE SUBSTANTIALLY ROUND PELLETS IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE WHICH RISES FROM ROOM TEMPERATURE TO A MAXIUM TEMPERATURE BETWEEN 1000* C. AND 1260* C.
References Cited (Backward Citations)
US2046071A
Cited
US2112380A
Cited
US2024176A
Cited
US2136096A
Cited
US2035845A
Cited
US2232444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |