Patent US3002574A successfully refreshed from Google Patents.
Patent US3122403A successfully refreshed from Google Patents.
Patent US2510855A successfully refreshed from Google Patents.
US2510855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of silicon compounds from water
Assignee: Dow Chemical Co
•
Filing: 1946-01-26
•
Granted: 1950-06-06
•
Expires: 1966-01-26
Abstract
No abstract record available.
Inventors
- 👤 William C Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:08
CPC Classifications
B; B01; B01J; B01J39/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF REMOVING DISSOLVED SILICON COMPOUNDS FROM WATER WHICH COMPRISES FORMING AN INTIMATE MIXTURE OF A FINELY DIVIDED FLUORIDE, OF THE GROUP CONSISTING OF CALCIUM FLUORIDE, STRONTIUM FLUORIDE, AND MAGNESIUM FLUORIDE, AND A GRANULAR CATION EXCHANGE AGENT IN ITS ACID FORM PASSING WATER WHICH CONTAINS A DISSOLVED SILICON COMPOUND THROUGH A BED COMPRISING SAID INTIMATE MIXTURE OF SPARINGLY SOLUBLE FLUORIDE AND A SUBSTANTIALLY WATER-INSOLUBLE CATON EXCHANGE AGENT, AND PASSING THE WATER FROM SAID BED TO AND THROUGH ANOTHER BED COMPRISING A SUBSTANTIALLY WATER-INSOLUBLE BASIC FORM OF AN ANION EXCHANGE AGENT.
Claim 2
Independent Claim
91 words
A METHOD OF REMOVING DISSOLVED SILICON COMPOUNDS FROM WATER WHICH COMPRISES FORMING AN INTIMATE MIXTURE OF A FINELY DIVIDED FLUORIDE, OF THE GROUP CONSISTING OF CALCIUM FLUORIDE, STRONTIUM FLUORIDE, AND MAGNESIUM FLUORIDE, AND A GRANULAR CATION EXCHANGE AGENT IN ITS ACID FORM PASSING WATER WHICH CONTAINS A DISSOLVED SILICON COMPOUND THROUGH A BED COMPRISING SAID INTIMATE MIXTURE OF SPARINGLY SOLUBLE FLUORIDE AND A SUBSTANTIALLY WATER-INSOLUBLE CATON EXCHANGE AGENT, AND PASSING THE WATER FROM SAID BED TO AND THROUGH ANOTHER BED COMPRISING A SUBSTANTIALLY WATER-INSOLUBLE BASIC FORM OF AN ANION EXCHANGE AGENT.
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) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |