Patent CH84860A successfully refreshed from Google Patents.
Patent US2442809A successfully refreshed from Google Patents.
US2442809A
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Water treating system comprising a sedimentation tank having a reagent line and means for withdrawing sludge from said tank and adding it to said line
Assignee: Phillips Petroleum Co
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Filing: 1944-08-02
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Granted: 1948-06-08
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Expires: 1964-08-02
Abstract
No abstract record available.
Inventors
- 👤 Albert H Hallier
- 👤 Glenn F Harris
- 👤 Walter C Kincaid
- 👤 Edward R Denson
- 👤 Robert H Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:42
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281; B; B01; B01D; B01D21/00; B01D21/0018; B01D21/01; B01D21/10
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-08 | 1951-12-08 | 1952-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-08 | 1955-12-08 | 1956-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-08 | 1959-12-08 | 1960-06-08 | $7700.00 | Window Closed / Lapsed |