US2693018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming lightweight aggregate
Assignee: Ohio State University Research Foundation
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Filing: 1951-06-20
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Granted: 1954-11-02
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Expires: 1971-06-20
Abstract
No abstract record available.
Inventors
- 👤 Kamil B Czarnecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:41
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
108 words
A PROCESS OF PRODUCING LIGHTWEIGHT AGGREGATE WHICH COMPRISES THE STEPS OF ADDING A HYDROCARBON OIL TO DRY CLAY-LIKE MATERIALS; 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; SUBSEQUENTLY TREATING THE PELLETS WITH A HYDROCARBON OIL HAVING A RELATIVELY HIGH VAPOR PRESSURE RELATIVE TO THE VAPOR PRESSURE OF THE FIRST NAMED HYDROCARBON OIL; AND SUBSEQUENTLY HEATING THE SUBSTANTIALLY ROUND COATED PEILETS IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE WHICH RISES FROM ROOM TEMPERATURE TO A MAXIMUM TEMPERATURE BETWEEN 1000* C. TO 1260* C.
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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 |