Patent US3171799A successfully refreshed from Google Patents.
US3171799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the demineralization of water
Assignee: Individual
•
Filing: 1962-08-28
•
Granted: 1965-03-02
•
Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 George W Batchelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:34
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/002; B01D71/00; B01D71/06; B01D71/08; B01D71/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR THE DEMINERALIZATION OF AQUEOUS SOLUTIONS CONTAINING NON-VOLATILE SALTS COMPRISING INTRODUCING SAID SALT-CONTAINING WATER INTO EACH OF TWO SEPARATE BUT ADJACENT ZONES, SAID ZONES BEING SEPARATED BY A SEMIPERMEABLE MEMBRANE; AND INTRODUCING A VOLATILE SOLUTE INTO A FIRST ONE OF SAID ZONES TO CAUSE DEMINERALIZED WATER TO MIGRATE INTO SAID FIRST ZONE, SID VOLATILE SOLUTE HAVING A MOLECULAR SIZE SUFFICIENT TO PREVENT SUBSTANTIAL AMOUNTS THEREOF FROM PASSING THROUGH SAID MEMBRANE.
Claim 2
Dependent Claim
72 words
A PROCESS FOR THE DEMINERALIZATION OF AQUEOUS SOLUTIONS CONTAINING NON-VOLATILE SALTS COMPRISING INTRODUCING SAID SALT-CONTAINING WATER INTO EACH OF TWO SEPARATE BUT ADJACENT ZONES, SAID ZONES BEING SEPARATED BY A SEMIPERMEABLE MEMBRANE; AND INTRODUCING A VOLATILE SOLUTE INTO A FIRST ONE OF SAID ZONES TO CAUSE DEMINERALIZED WATER TO MIGRATE INTO SAID FIRST ZONE, SID VOLATILE SOLUTE HAVING A MOLECULAR SIZE SUFFICIENT TO PREVENT SUBSTANTIAL AMOUNTS THEREOF FROM PASSING THROUGH SAID MEMBRANE.
References Cited (Backward Citations)
US3097076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |