US3598618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesia bearing porous grains and bodies
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1968-02-08
•
Granted: 1971-08-10
•
Expires: 1988-02-08
Abstract
Abstract A SMALL AMOUNT OF STRONG ACETIC ACID REACTS WITH MAGNESIA OR MAGNESIUM HYDROXIDE TO FORM STRONLY COHERENT POROUS GRAINS OR PELLETS WHICH, AFTER BEING MOISTENED WITH A SMALL AMOUNT OF WATER, CAN BE SHAPED WITH OR WITHOUT ADDITION OF REFRACTORY FILLERS AND FIRED INTO POROUS MAGNESIA BODIES. A SLURRY PREPARED FROM MAGNESIA OF MAGNESIUM HYDROXIDE, ACETIC ACID, A SMALL AMOUNT OF WATER AND CHEMICAL FOAMING AGENT SOLIDFIES WITHIN A FEW MINUTES INTO A POROUS BODY WHICH CAN BE FIRED TO PRODUCE MAGNESIA BRICKS LIGHTER THAN WATER.
Inventors
- 👤 Kinjiro Fujii
- 👤 Yoshihiko Ishido
- 👤 Akihiro Motoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:33
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |