US3759494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve plate of column still
Assignee: Individual
•
Filing: 1971-07-21
•
Granted: 1973-09-18
•
Expires: 1991-07-21
Abstract
Abstract A valve plate of a column still for mass transfer between gas and liquid wherein the valves are shaped like cones with their apices pointing down and the side surfaces of said valves have grooves for rotating the valves by the force of the gas flowing through said valves. Installed above the valves are the valve lift checks.
Inventors
- 👤 L Axelrod
- 👤 B Garbuzovsky
- 👤 V Fedorov
- 👤 R Barashkov
- 👤 A Akatov
- 👤 V Rudenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:50
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/163
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
71 words
A valve plate of a column still for mass transfer processes between gas and liquid comprising: holes in said plate; valves closing said holes, made in the form of cones with apices pointing down; grooves located on the side surface of said valves and intended to impart rotary motion to said valves due to the force of the gas flow passing through the valves; checks limiting the lift of said valves.
Claim 2
Dependent Claim
71 words
A valve plate of a column still for mass transfer processes between gas and liquid comprising: holes in said plate; valves closing said holes, made in the form of cones with apices pointing down; grooves located on the side surface of said valves and intended to impart rotary motion to said valves due to the force of the gas flow passing through the valves; checks limiting the lift of said valves.
Claim 3
Dependent Claim
73 words
A valve plate according to claim 1 wherein said valve lift check is made in the form of an inverted cup installed above said valve, fitting against said plate and having hydraulically streamlined walls which are provided with slots for the directional passage of the gas, the size and number of said slots being selected so as to prevent the liquid flowing over said valve plate from penetrating under said valve lift checks.
References Cited (Backward Citations)
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Cited
US1967799A
Cited
US2391464A
Cited
US2391502A
Cited
US3055646A
Cited
US3618913A
Cited
JPH04213688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |