Patent US3420709A successfully refreshed from Google Patents.
US3420709A
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US
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Liquid purification by adsorption
Assignee: Rohm and Haas Co
•
Filing: 1965-04-29
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Granted: 1969-01-07
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Expires: 1985-04-29
Abstract
No abstract record available.
Inventors
- 👤 Harold E Barrett Jr
- 👤 Bernard N Dickinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:24
CPC Classifications
B; B01; B01D; B01D15/00; C; C02; C02F; C02F1/00; C02F1/28; C02F1/283; C02F1/42; C02F2101/00; C02F2101/30; C02F2101/308; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
AU246311B
Cited
US2191365A
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US2261920A
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US2490716A
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US2595290A
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US2600085A
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US3223619A
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US3197338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |