US2732415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Klinge
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:43
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
A METHOD OF EXTRACTING HEAT-SENSITIVE MATERIAL, WHICH COMPRISES THE STEPS OF CARRYING OUT THE EXTRACTION BY A SOLVENT WITH EXCLUSION OF HEATING AND UNDER ATMOSPHERIC PRESSURE, INTERMITTENTLY REMOVING THE EXTRACTED MATERIAL WITH THE SOLVENT, SEPARATING THE EXTRACTED MATERIAL FROM SAID SOLVENT BY HEATING THE LATTER TO MODERATELY INCREASED TEMPERATURE BELOW ONE INJURIOUSLY AFFECTING THE EXTRACTIVE AND BY INTERMITTENTLY SUCKING THE SOLVENT OFF UNDER REDUCED PRESSURE, CONDENSING THE VAPORS THEREOF, AND RETURNING THE LIQUID SOLVENT TO THE EXTRACTING STEP.
References Cited (Backward Citations)
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Cited
US829763A
Cited
US1636550A
Cited
US1880634A
Cited
US1942848A
Cited
US2451081A
Cited
US2413107A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |