US3757367A
Expired / Lapsed
US
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Method for carbon dioxide snow separation
Assignee: Cardox Corp
•
Filing: 1971-02-08
•
Granted: 1973-09-11
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Expires: 1991-02-08
Abstract
Abstract Improved method and apparatus for separating carbon dioxide snow from a mixture of carbon dioxide snow and vapor, without reference to gravity, in order to deliver carbon dioxide snow and vapor each at a substantial rate of flow.
Inventors
- 👤 R Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:39
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/50; C01B32/55
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
12 words
The method of claim 1 wherein the curvilinear flow path is arcuate.
Claim 2
Dependent Claim
19 words
The method of claim 2 wherein the curvilinear flow path extends over approximately from 90* to 180* of arc.
Claim 3
Dependent Claim
46 words
The method of claim 1 further comprising the step of flashing liquefied carbon dioxide to introduce the mixture of carbon dioxide snow and vapor into said end of the tubular conduit for flow of the mixture axially through the tubular conduit along the curvilinear flow path.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein liquefied carbon dioxide is flashed through a restricted flow path communicating with the curvilinear flow path.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the steps are performed at a pressure above atmospheric pressure.
Claim 6
Dependent Claim
18 words
The method of claim 1 further comprising the step of applying back pressure to the curvilinear flow path.
Claim 7
Dependent Claim
19 words
The method of claim 6 wherein the steps are performed at a pressure which does not exceed 20 psig.
Claim 8
Dependent Claim
19 words
The method of claim 6 wherein the steps are performed at a pressure which does not exceed 10 psig.
Claim 9
Dependent Claim
19 words
The method of claim 6 wherein the steps are performed at a pressure which does not exceed 7 psig.
Claim 10
Dependent Claim
23 words
The method of claim 7 wherein the remainder of the mixture flows through a restricted flow path communicating with the curvilinear flow path.
Claim 11
Dependent Claim
26 words
The method of claim 1 wherein the concentrated stream of carbon dioxide snow is deflected for flow along a flow path intersecting the curvilinear flow path.
Claim 12
Dependent Claim
30 words
The method of claim 12 wherein the concentrated stream of carbon dioxide snow is deflected for flow radially outwardly through an opening in the lateral wall of the tubular conduit.
Claim 13
Dependent Claim
55 words
The method of claim 12 further comprising the step of flashing liquefied carbon dioxide at a controlled rate to introduce a mixture of carbon dioxide snow and vapor into the curvilinear flow path and to control production of granular particles of carbon dioxide snow for flow in the flow path intersecting the curvilinear flow path.
Claim 14
Dependent Claim
41 words
The method of claim 14 further comprising the step of reducing the rate at which liquefied carbon dioxide is flashed to retard production of granular particles of carbon dioxide snow for flow in the flow path intersecting the curvilinear flow path.
Claim 15
Dependent Claim
41 words
The method of claim 14 further comprising the step of increasing the rate at which liquefied carbon dioxide is flashed to promote production of granular particles of carbon dioxide snow for flow in the flow path intersecting the curvilinear flow path.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |