US2877095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of magnesium fluoride
Assignee: Dow Chemical Co
•
Filing: 1957-01-07
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Granted: 1959-03-10
•
Expires: 1977-01-07
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:07
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/26; C01F5/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR THE PREPARATION OF MAGNESIUM FLUORIDE IN A FILTERABLE FORM, WHICH COMPRISES INTERMIXING FINELY GROUP CALCIUM FLUORIDE WITH AN AQUEOUS MAGNESIUM CHLORIDE SOLUTION CONTAINING FROM 30 OT 42 WEIGHT PERCENT MAGNESIUM CHLORIDE, HEATING, TO A TEMPERATURE IN THE SUFFICIENT PRESSURE TO MAINTAIN THE MIXTURE IN LIQUID PHASE TO REACT THE CALCIUM FLUORIDE WITH THE MAGNESIUM CHLORIDE, AND SEPARATING THE MAGNESIUM FLUORIDE THUS FORMED.
Claim 2
Dependent Claim
65 words
A PROCESS FOR THE PREPARATION OF MAGNESIUM FLUORIDE IN A FILTERABLE FORM, WHICH COMPRISES INTERMIXING FINELY GROUP CALCIUM FLUORIDE WITH AN AQUEOUS MAGNESIUM CHLORIDE SOLUTION CONTAINING FROM 30 OT 42 WEIGHT PERCENT MAGNESIUM CHLORIDE, HEATING, TO A TEMPERATURE IN THE SUFFICIENT PRESSURE TO MAINTAIN THE MIXTURE IN LIQUID PHASE TO REACT THE CALCIUM FLUORIDE WITH THE MAGNESIUM CHLORIDE, AND SEPARATING THE MAGNESIUM FLUORIDE THUS FORMED.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |