US3580844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing oil emulsions used in metal machining
Assignee: Evonik Operations GmbH
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Filing: 1969-11-04
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Granted: 1971-05-25
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Expires: 1989-11-04
Abstract
Abstract AQUEOUS OIL EMULSIONS USED IN METAL MACHINING ARE SEPARATED INTO AN AQUEOUS PHASE AND AN OILY PHASE BY ADDING A MIXTURE OF A FORMATE OR ACETATE OF AN ALKALINE EARTH METAL, EARTH METAL, CADMIUM OR ZINC TO THE EMULSION TO BREAK THE EMULSION WITH A FINELY DIVIDED ABSORBENT AND ADSORB THE SEPARATING OIL, THEREBY CONVERTING THE OIL TO A FILTERABLE FORM AND FILTERING IT OFF.
Inventors
- 👤 Helmut Fratzscher
- 👤 Kurt Klein
- 👤 Joachim Maluzi
- 👤 Peter Hansen
- 👤 Werner Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:41
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04; C10M; C10M175/00; C10M175/04; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |