US3339618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing powder and granular calcium chloride products
Assignee: Wyandotte Chemicals Corp
•
Filing: 1963-06-13
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Granted: 1967-09-05
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Expires: 1983-06-13
Abstract
No abstract record available.
Inventors
- 👤 John H Bowden
- 👤 Clifford T Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:34
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/20; C01F11/24; C01F11/30; C09; C09K; C09K3/00; C09K3/18; C09K3/185; Y; Y10; Y10S; Y10S159/00; Y10S159/03
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
A PROCESS FOR PREPARING GRANULAR ANHYDROUS CALCIUM CHLORIDE BY INITIALLY DRYING AN AQUEOUS SOLUTION OF CALCIUM CHLORIDE, THE SAID DRYING CONSISTING SOLELY OF SPRAYING AN AQUEOUS SOLUTION OF CALCIUM CHLORIDE CONTAINING ABOUT 35% TO 60% BY WEIGHT OF CALCIUM CHLORIDE INTO AN ESSENTIALLY DRY GAS STREAM AT A TEMPERATURE OF AT LEAST ABOUT 400*F. TO PRODUCE FINELY DIVIDED ANHYDROUS CALCIUM CHLORIDE POWDER, AND FURTHER COMPRISING COMPACTING SAID POWDER AT A TEMPERATURE OF ABOUT 200 TO 375*F. INTO A SHEET OF COMPACT ANHYDROUS CALCIUM CHLORIDE, BREAKING SAID SHEET INTO FLAKE-LIKE PARTICLES, CRUSHING SAID PARTICLES TO THE DESIRED PARTICLE SIZE, AND SCREENING THE CRUSHED PARTICLES TO SEPARATE A PRODUCT OF DESIRED PARTICLE SIZE.
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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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |