Patent US3741908A successfully refreshed from Google Patents.
US3741908A
Expired / Lapsed
US
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Depurative process and composition
Assignee: Chemetron Corp
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Filing: 1970-03-04
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Granted: 1973-06-26
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Expires: 1990-03-04
Abstract
Abstract THIS INVENTION RELATES TO A METHOD FOR RESOLVING OILWATER MIXTURES AND EMULSIONS INTO SEPARATE PHASES AND INCLUDES A COMPOSITION COMPRISING A CRITICAL PROPORTION OF IRON AND CALCIUM SALTS, THE CALCIUM TO IRON RATIO BEING FROM ABOUT 1.5:1 TO ABOUT 5:1.
Inventors
- 👤 J Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:08
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C10; C10G; C10G33/00; C10G33/04
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |