Patent US2694675A successfully refreshed from Google Patents.
US2694675A
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Multistage centrifugal rectification apparatus
Assignee: Individual
•
Filing: 1951-08-21
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Granted: 1954-11-16
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Expires: 1971-08-21
Abstract
No abstract record available.
Inventors
- 👤 Walter H Hogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:06
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A CENTRIFUGAL STILL COMPRISING A ROTATING VERTICAL SHAFT, A PLURALITY OF VAPORIZING PLATES ROTATABLE WITH THE SHAFT, A STATIONARY CONDENSER PLATE IN THE FORM OF AN INVERTED CONE COAXIAL WITH THE SHAFT AND DISPOSED BENEATH EACH VAPORIZING PLATE, HEATING MEANS FOR THE VAPORIZING PLATES, PERIPHERAL TROUGHS FOR COLLECTING RESIDUES FROM THE VAPORIZING PLATES, VERTICAL LIFT MEANS OPERATED BY THE SHAFT TO CONVEY MATERIAL FROM ANY CONDENSER PLATE TO THE VAPORIZING PLATE NEXT ABOVE, AND CONNECTIONS FROM CERTIAN OF THE TROUGHS TO THE LOWER PORTIONS OF THE VERTICAL LIFT MEANS OF A LOWER SECTION.
Claim 2
Dependent Claim
93 words
A CENTRIFUGAL STILL COMPRISING A ROTATING VERTICAL SHAFT, A PLURALITY OF VAPORIZING PLATES ROTATABLE WITH THE SHAFT, A STATIONARY CONDENSER PLATE IN THE FORM OF AN INVERTED CONE COAXIAL WITH THE SHAFT AND DISPOSED BENEATH EACH VAPORIZING PLATE, HEATING MEANS FOR THE VAPORIZING PLATES, PERIPHERAL TROUGHS FOR COLLECTING RESIDUES FROM THE VAPORIZING PLATES, VERTICAL LIFT MEANS OPERATED BY THE SHAFT TO CONVEY MATERIAL FROM ANY CONDENSER PLATE TO THE VAPORIZING PLATE NEXT ABOVE, AND CONNECTIONS FROM CERTIAN OF THE TROUGHS TO THE LOWER PORTIONS OF THE VERTICAL LIFT MEANS OF A LOWER SECTION.
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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) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |