US3106515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for concentrating nitric acid
Assignee: Eastman Kodak Co
•
Filing: 1956-02-01
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Granted: 1963-10-08
•
Expires: 1976-02-01
Abstract
No abstract record available.
Inventors
- 👤 Robert A Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:06
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/38; C01B21/44; Y; Y10; Y10S; Y10S159/00; Y10S159/15; Y10S159/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A COMBINATION OF APPARATUS FOTHE CONCENTRATION OF NITRIC ACID WHICH COMPRISES A VERTICAL STRIPPING COLUMN HAVING AN AGGREGATE LENGTH EQUIVALENT TO AT LEAST 8 THEORETICALLY PERFECT DISTILLATION PLATES, SUBSTANTIALLY ABOVE THE STRIPPING COLUMN, A VERTICAL RECTIFYING COLUMN THE UPPER PORTION ONLY OF WHICH IS PACKED AND AN ENCLOSED BOILING VESSEL SUBSTANTIALLY BELOW THE STRIPPING COLUMN, THE TOP OF THE STRIPPING COLUMN BEING CONNECTED TO THE RECTIFYING COLUMN BOTH BY AN INLET THERETO FROM THE BOTTOM OF THE LATTER AND AN OUTLET THEREFROM ENTERING THE LATTER COLUMN NEAR THE TOP OF THE NONPACKED PORTION, THE BOTTOM OF THE STRIPPING COLUMN BEING CONNECTED TO THE BOILING VESSEL BY AN OUTLET THEREFROM TO THE LATTER AND AN INLET THERETO FROM THE TOP OF SAID BOILING VESSEL, THE TOP OF THE RECTIFYING COLUMN BEING CONNECTED BY AN OUTLET TO A CONDENSER AND AN INLET FROM THE CONDENSATE PORTION OF THE CONDENSER, THE BOILING VESSEL HAVING A SOURCE OF HEAT TO PROMOTE BOIL-
Claim 2
Dependent Claim
158 words
A COMBINATION OF APPARATUS FOTHE CONCENTRATION OF NITRIC ACID WHICH COMPRISES A VERTICAL STRIPPING COLUMN HAVING AN AGGREGATE LENGTH EQUIVALENT TO AT LEAST 8 THEORETICALLY PERFECT DISTILLATION PLATES, SUBSTANTIALLY ABOVE THE STRIPPING COLUMN, A VERTICAL RECTIFYING COLUMN THE UPPER PORTION ONLY OF WHICH IS PACKED AND AN ENCLOSED BOILING VESSEL SUBSTANTIALLY BELOW THE STRIPPING COLUMN, THE TOP OF THE STRIPPING COLUMN BEING CONNECTED TO THE RECTIFYING COLUMN BOTH BY AN INLET THERETO FROM THE BOTTOM OF THE LATTER AND AN OUTLET THEREFROM ENTERING THE LATTER COLUMN NEAR THE TOP OF THE NONPACKED PORTION, THE BOTTOM OF THE STRIPPING COLUMN BEING CONNECTED TO THE BOILING VESSEL BY AN OUTLET THEREFROM TO THE LATTER AND AN INLET THERETO FROM THE TOP OF SAID BOILING VESSEL, THE TOP OF THE RECTIFYING COLUMN BEING CONNECTED BY AN OUTLET TO A CONDENSER AND AN INLET FROM THE CONDENSATE PORTION OF THE CONDENSER, THE BOILING VESSEL HAVING A SOURCE OF HEAT TO PROMOTE BOIL-
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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) | 1966-10-07 | 1967-04-08 | 1967-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-07 | 1971-04-08 | 1971-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-07 | 1975-04-08 | 1975-10-08 | $7700.00 | Window Closed / Lapsed |