US3071816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium chloride manufacture
Assignee: PPG Industries Inc
•
Filing: 1960-01-19
•
Granted: 1963-01-08
•
Expires: 1980-01-19
Abstract
No abstract record available.
Inventors
- 👤 Robert M Allen
- 👤 Richard J Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:06
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/20; C01F11/24; C01F11/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN THE METHOD OF PREPARING SIZED FLAKE CALCIUM CHLORIDE PRODUCT BY DEPOSITING FROM A HOT LIQUID BODY OF CALCIUM CHLORIDE A LAYER OF SOLIDIFIED CALCIUM CHLORIDE UPON A COOL SURFACE, REMOVING THE LAYER FROM THE SURFACE AND SIZING SO REMOVED SOLIDS TO OBTAIN CALCIUM CHLORIDE FINES SMALLER THAN 20 MESH, THE IMPROVEMENT WHICH COMPRISES DEPOSITING THE LAYER FROM A HOT LIQUID BODY COMPRISING A SLURRY OF SOLID CALCIUM CHLORIDE PARTICLES AND AQUEOUS LIQUID CALCIUM CHLORIDE SOLUTION WHICH SOLUTION HAS A COMPOSITION APPROXIMATING THAT OF CALCIUM CHLORIDE DIHYDRATE AND ADDING SAID FINES FROM THE SIZING TO THE HOT LIQUID BODY WHEREBY TO PROVIDE FOR THE SOLID CALCIUM CHLORIDE PARTICLE CONTENT OF THE SLURRY.
Claim 2
Dependent Claim
112 words
IN THE METHOD OF PREPARING SIZED FLAKE CALCIUM CHLORIDE PRODUCT BY DEPOSITING FROM A HOT LIQUID BODY OF CALCIUM CHLORIDE A LAYER OF SOLIDIFIED CALCIUM CHLORIDE UPON A COOL SURFACE, REMOVING THE LAYER FROM THE SURFACE AND SIZING SO REMOVED SOLIDS TO OBTAIN CALCIUM CHLORIDE FINES SMALLER THAN 20 MESH, THE IMPROVEMENT WHICH COMPRISES DEPOSITING THE LAYER FROM A HOT LIQUID BODY COMPRISING A SLURRY OF SOLID CALCIUM CHLORIDE PARTICLES AND AQUEOUS LIQUID CALCIUM CHLORIDE SOLUTION WHICH SOLUTION HAS A COMPOSITION APPROXIMATING THAT OF CALCIUM CHLORIDE DIHYDRATE AND ADDING SAID FINES FROM THE SIZING TO THE HOT LIQUID BODY WHEREBY TO PROVIDE FOR THE SOLID CALCIUM CHLORIDE PARTICLE CONTENT OF THE SLURRY.
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |