Patent US5006487A successfully refreshed from Google Patents.
Patent US2813781A successfully refreshed from Google Patents.
US2813781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Countercurrent contact of liquid and solid
Assignee: Sunoco Inc
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Filing: 1953-12-15
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Granted: 1957-11-19
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Expires: 1973-12-15
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Mertes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:17
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/10; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D15/00; B01D15/02; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004; B01J8/00; B01J8/18; B01J8/20; B01D15/08; B01D15/10; B01D15/18; B01D15/1892; B01D2011/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
METHOD OF COUNTERCURRENTLY CONTACTING A LIQUID WITH A PARTICULATE SOLID MATERIAL IN COLUM HAVING A CONCURRENT FLOW ZONE A AND COUNTERCURRENT CONTACTING ZONE B, WHICH METHOD COMPRISES: PASSING LIQUID FOR COUNTERCURRENT CONTACT WITH SOLID THROUGH ZONE B IN A DIRECTION TOWARD ZONE A AND WITHDRAWNING THE PRODUCT FROM THE COLUMN ADJACENT THAT END OF ZONE B WHICH IS NEAREST TO ZONE A; PASSING A CARRIER LIQUID THROUGH ZONE A IN A DIRECTION TOWARDS ZONE B AND WITHDRAWING IT FROM THE COLUMN ADJACENT THAT END OF ZONE A WHICH IS NEAREST TO ZONE B; FEEDING PARTICULATE SOLID INTO THE COLUMN ALONG
Claim 2
Dependent Claim
100 words
METHOD OF COUNTERCURRENTLY CONTACTING A LIQUID WITH A PARTICULATE SOLID MATERIAL IN COLUM HAVING A CONCURRENT FLOW ZONE A AND COUNTERCURRENT CONTACTING ZONE B, WHICH METHOD COMPRISES: PASSING LIQUID FOR COUNTERCURRENT CONTACT WITH SOLID THROUGH ZONE B IN A DIRECTION TOWARD ZONE A AND WITHDRAWNING THE PRODUCT FROM THE COLUMN ADJACENT THAT END OF ZONE B WHICH IS NEAREST TO ZONE A; PASSING A CARRIER LIQUID THROUGH ZONE A IN A DIRECTION TOWARDS ZONE B AND WITHDRAWING IT FROM THE COLUMN ADJACENT THAT END OF ZONE A WHICH IS NEAREST TO ZONE B; FEEDING PARTICULATE SOLID INTO THE COLUMN ALONG
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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |