US2895886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillation apparatus
Assignee: Bayer AG
•
Filing: 1953-04-08
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Granted: 1959-07-21
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Expires: 1973-04-08
Abstract
No abstract record available.
Inventors
- 👤 Schneider Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:46
CPC Classifications
C; C11; C11C; C11C1/00; C11C1/08; C11C1/10; B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D1/223; B01D1/225; B01D3/00; B01D3/10; B01D3/14; B01D3/143; B01D3/148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A DISTILLATION APPARATUS COMPRISING A DISTILLATION COLUMN AND A FILM EVAPORATOR CONNECTED TO SAID DISTILLATION COLUMN FOR RECEIVING REFLUX FROM THE LOWER END PORTION OF SAID DISTILLATION COLUMN INTO ITS UPPER END PORTION AND FOR PASSING VAPOR FROM ITS UPPER END PORTION UPWARDLY TO THE LOWER END PORTION OF SAID DISTILLATION COLUMN, SAID FILM EVAPORATOR HAVING A VERTICALLY EXTENDING EVAPORATOR SURFACE.
Claim 2
Dependent Claim
61 words
A DISTILLATION APPARATUS COMPRISING A DISTILLATION COLUMN AND A FILM EVAPORATOR CONNECTED TO SAID DISTILLATION COLUMN FOR RECEIVING REFLUX FROM THE LOWER END PORTION OF SAID DISTILLATION COLUMN INTO ITS UPPER END PORTION AND FOR PASSING VAPOR FROM ITS UPPER END PORTION UPWARDLY TO THE LOWER END PORTION OF SAID DISTILLATION COLUMN, SAID FILM EVAPORATOR HAVING A VERTICALLY EXTENDING EVAPORATOR SURFACE.
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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) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |