US3218130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing magnesia clinker using anhydrous magnesium chloride as a mineralizer
Assignee: Individual
•
Filing: 1962-02-13
•
Granted: 1965-11-16
•
Expires: 1982-02-13
Abstract
No abstract record available.
Inventors
- 👤 Kawai Nobuo
- 👤 Otake Takeshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:02
CPC Classifications
C; C04; C04B; C04B2/00; C04B2/10; C04B2/104
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A METHOD OF PRODUCING MAGNESIA CLINKER COMPRISING THE STEPS OF DEHYDRATING MAGNESIUM HYDROXIDE BY CALCINING THE SAME, ADDING TO SAID CALCINED MAGNESIUM HYDROXIDE BETWEEN ABOUT 0.3-3.0% OF ANHYDROUS MAGNESIUM CHLORIDE, AND SINTERING SAID MIXTURE BY HEATING IT AT TEMPERATURES FROM ABOUT 1,500*C. TO 1,700*C.
Claim 2
Independent Claim
44 words
A METHOD OF PRODUCING MAGNESIA CLINKER COMPRISING THE STEPS OF DEHYDRATING MAGNESIUM HYDROXIDE BY CALCINING THE SAME, ADDING TO SAID CALCINED MAGNESIUM HYDROXIDE BETWEEN ABOUT 0.3-3.0% OF ANHYDROUS MAGNESIUM CHLORIDE, AND SINTERING SAID MIXTURE BY HEATING IT AT TEMPERATURES FROM ABOUT 1,500*C. TO 1,700*C.
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |