US3143497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for recovering residual solvent from sludge
Assignee: Max Boehler & Ferdinand Weber
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Filing: 1960-02-25
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Granted: 1964-08-04
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Expires: 1980-02-25
Abstract
No abstract record available.
Inventors
- 👤 Fuehring Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:39
CPC Classifications
D; D06; D06F; D06F43/00; D06F43/08; D06F43/081; D06F43/085; D06F39/00; D06F39/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR RECOVERING RESIDUAL SOLVENT FROM SLUDGE ACCUMULATED ON A FILTER MASS DURING A FILTRATION STAGE IN WHICH THE FILTERED SOLVENT PASSES THROUGH AN OUTLET INTO A COLLECTOR, COMPRISING THE STEPS OF COMPACTING SAID SLUDGE UNDER FLUID PRESSURE AGAINST SAID FILTER MASS, THEREBY SQUEEZING AND INITIAL FLOW OF SOLVENT FROM SAID SLUDGE, DIRECTIN THE SQUEEZED-OUT SOLVENT THROUGH SAID OUTLET INTO THE COLLECTOR, SUBSEQUENTLY DISCONNECTING
Claim 2
Dependent Claim
65 words
A PROCESS FOR RECOVERING RESIDUAL SOLVENT FROM SLUDGE ACCUMULATED ON A FILTER MASS DURING A FILTRATION STAGE IN WHICH THE FILTERED SOLVENT PASSES THROUGH AN OUTLET INTO A COLLECTOR, COMPRISING THE STEPS OF COMPACTING SAID SLUDGE UNDER FLUID PRESSURE AGAINST SAID FILTER MASS, THEREBY SQUEEZING AND INITIAL FLOW OF SOLVENT FROM SAID SLUDGE, DIRECTIN THE SQUEEZED-OUT SOLVENT THROUGH SAID OUTLET INTO THE COLLECTOR, SUBSEQUENTLY DISCONNECTING
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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |