Patent US3425235A successfully refreshed from Google Patents.
US3425235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent purification
Assignee: Individual
•
Filing: 1955-05-26
•
Granted: 1969-02-04
•
Expires: 1975-05-26
Abstract
No abstract record available.
Inventors
- 👤 Robert B Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:48
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/22; C02F2103/00; C02F2103/08; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y10; Y10S; Y10S203/00; Y10S203/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A WATER SOLUTION CONTAINING SALTS DISSOLVED THEREIN, THE METHOD OF PURIFYING THE WATER WHICH COMPRISES: DEAERATING THE RAW SALT SOLUTION BY SUBJECTING THE RAW SALT SOLUTION TO A PRESSURE SUFFICIENTLY LOW TO REMOVE GASES CONTAINED IN THE RAW SALT SOLUTION; VAPORIZING A PORTION OF THE DEAERATED SALT SOLUTION AT A PRESSURE SUFFICIENTLY LOW TO PRODUCE ICE CRYSTALS IN THE REMAINING AQUEOUS SALT WATER SOLUTION; REMOVING THE RESULTING WATER VAPOR; COMPRESSING THE WATER VAPOR TO A PRESSURE SUFFICIENTLY HIGH TO PERMIT IT TO CONDENSE WHEN PLACED IN HEAT EXCHANGE RELATIONSHIP WITH THE ICE CRYSTALS; REMOVING THE MIXTURE OF ICE CRYSTALS AND REMAINING AQUEOUS SALT SOLUTION; SEPARATING THE ICE CRYSTALS FROM THE REMAINING AQUEOUS SALT SOLUTION; AND BRINGING THE SEPARATED ICE CRYSTALS INTO DIRECT HEAT EXCHANGE RELATIONSHIP WITH THE COMPRESSED WATER VAPOR.
Claim 2
Dependent Claim
131 words
IN A WATER SOLUTION CONTAINING SALTS DISSOLVED THEREIN, THE METHOD OF PURIFYING THE WATER WHICH COMPRISES: DEAERATING THE RAW SALT SOLUTION BY SUBJECTING THE RAW SALT SOLUTION TO A PRESSURE SUFFICIENTLY LOW TO REMOVE GASES CONTAINED IN THE RAW SALT SOLUTION; VAPORIZING A PORTION OF THE DEAERATED SALT SOLUTION AT A PRESSURE SUFFICIENTLY LOW TO PRODUCE ICE CRYSTALS IN THE REMAINING AQUEOUS SALT WATER SOLUTION; REMOVING THE RESULTING WATER VAPOR; COMPRESSING THE WATER VAPOR TO A PRESSURE SUFFICIENTLY HIGH TO PERMIT IT TO CONDENSE WHEN PLACED IN HEAT EXCHANGE RELATIONSHIP WITH THE ICE CRYSTALS; REMOVING THE MIXTURE OF ICE CRYSTALS AND REMAINING AQUEOUS SALT SOLUTION; SEPARATING THE ICE CRYSTALS FROM THE REMAINING AQUEOUS SALT SOLUTION; AND BRINGING THE SEPARATED ICE CRYSTALS INTO DIRECT HEAT EXCHANGE RELATIONSHIP WITH THE COMPRESSED WATER VAPOR.
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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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |