Patent US3437575A successfully refreshed from Google Patents.
US3437575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-liquid extraction
Assignee: GEA Group AG
•
Filing: 1966-08-23
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Granted: 1969-04-08
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Expires: 1986-08-23
Abstract
No abstract record available.
Inventors
- 👤 Hans-Werner Gross
- 👤 Gottfried Schwedler
- 👤 Eckart Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:17
CPC Classifications
C; C10; C10G; C10G21/00; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0419; C10G32/00; C10G32/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN THE PROCESS OF SEPARATING LIQUID MIXTURES OF SUBSTANTIALLY NON-AQUEOUS COMPONENTS, WHEREIN THE MORE POLAR OF SAID COMPONENTS CONSTITUTES ABOUT 20 TO 75 PERCENT OF SAID MIXTURE, BY THE APPLICATION OF AN ELECTRIC FIELD; THE IMPROVEMENT WHICH COMPRISES OPERATING SAID ELECTRIC FIELD AT ABOUT 1 TO 60 VOLTS PER CENTIMETER AT A VOLTAGE OF ABOUT 10 TO 500 VOLTS.
Claim 2
Dependent Claim
59 words
IN THE PROCESS OF SEPARATING LIQUID MIXTURES OF SUBSTANTIALLY NON-AQUEOUS COMPONENTS, WHEREIN THE MORE POLAR OF SAID COMPONENTS CONSTITUTES ABOUT 20 TO 75 PERCENT OF SAID MIXTURE, BY THE APPLICATION OF AN ELECTRIC FIELD; THE IMPROVEMENT WHICH COMPRISES OPERATING SAID ELECTRIC FIELD AT ABOUT 1 TO 60 VOLTS PER CENTIMETER AT A VOLTAGE OF ABOUT 10 TO 500 VOLTS.
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) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |