US2636807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of calcium chloride
Assignee: General Electric Co
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Filing: 1951-10-09
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Granted: 1953-04-28
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Expires: 1971-10-09
Abstract
No abstract record available.
Inventors
- 👤 John F Ross
- 👤 Harold W Sloyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:31
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/40; H05K3/4038; H05K3/4046; C; C01; C01F; C01F11/00; C01F11/20; C01F11/24; C01F11/32; C08; C08L; C08L97/00; C08L97/02; H01; H01J; H01J29/00; H01J29/92; H01J9/00; H01J9/24; H01J9/28; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0364; H05K2201/0382; H05K2201/10; H05K2201/10227; H05K2201/10416; H05K3/30; H05K3/32; H05K3/34; H05K3/346
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
THE METHOD OF TREATING SLIGHTLY ALKALINE CALCIUM CHLORIDE CONTAINING IRON AND HEAVY METAL IMPURITIES WHICH INCLUDED THE STEPS OF NEUTRALIZING THE SLIGHT ALKALINITY OF THE CALCIUM CHLORIDE SOLUTION BY SLOWLY ADDING DILUTE PHOSPHORIC ACID THERETO UNTIL THE PH OF THE SOLUTION IS BROUGHT TO ABOUT 6.5, AND THEN FILTERING THE RESULTING SUSPENSION CONTAINING THE INSOLUBILIZED CONTAMINANTS TO THEREBY OBTAIN THE PURIFIED CALCIUM CHLORIDE SOLUTION.
Claim 2
Independent Claim
64 words
THE METHOD OF TREATING SLIGHTLY ALKALINE CALCIUM CHLORIDE CONTAINING IRON AND HEAVY METAL IMPURITIES WHICH INCLUDED THE STEPS OF NEUTRALIZING THE SLIGHT ALKALINITY OF THE CALCIUM CHLORIDE SOLUTION BY SLOWLY ADDING DILUTE PHOSPHORIC ACID THERETO UNTIL THE PH OF THE SOLUTION IS BROUGHT TO ABOUT 6.5, AND THEN FILTERING THE RESULTING SUSPENSION CONTAINING THE INSOLUBILIZED CONTAMINANTS TO THEREBY OBTAIN THE PURIFIED CALCIUM CHLORIDE SOLUTION.
References Cited (Backward Citations)
US1538910A
Cited
US2143438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |