US2642393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutralization of liquids
Assignee: LIMESTONE PRODUCTS Corp
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Filing: 1949-01-29
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Granted: 1953-06-16
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Expires: 1969-01-29
Abstract
No abstract record available.
Inventors
- 👤 Harry W Gehm
- 👤 Lee T Purcell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:07
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/66; B; B01; B01J; B01J19/00; B01J19/0086
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
THE METHOD OF NEUTRALIZING LIQUID WASTE WHICH METHOD INCLUDES THE STEPS OF CAUSING THE WASTE LIQUID TO FLOW UPWARDLY THROUGH A BED OF NEUTRALIZING MATERIAL CONSISTING OF SOLID PARTICLES, EFFECTING A SUSPENSION AND AGITATION OF THE PARTICLES OF THE NEUTRALIZING MATERIALS DURING THE PASSAGE OF THE LIQUID THERETHROUGH BY INTRODUCING A FLUID UNDER PRESSURE AND IN A PLURALITIY OF STREAMS AT THE BASE OF THE BED OF THE NEUTRALIZING MATERIAL, EFFECTING A DOWN-FLOW OF THE EFFLUENT ISSUING FROM THE NEUTRALIZING MA-
References Cited (Backward Citations)
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US758367A
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US1248329A
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US1189114A
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GB259385A
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US1765424A
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US2352901A
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US2428418A
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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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |