US3859807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold trap system for recovering condensable gas from a vessel to be evacuated
Assignee: United States Atomic Energy Commission
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Filing: 1947-08-26
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Granted: 1975-01-14
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Expires: 1967-08-26
Abstract
Abstract 1. A system for recovering a condensible gas by solidifying the same in a cold trap that comprises a vessel to be evacuated, a pump having an inlet and an outlet side and arranged to withdraw gas from said vessel, means connecting said vessel with the intake side of said pump, a refrigerated cold trap for solidifying said gas, said trap having an inlet and an outlet, means connecting the inlet of said cold trap with the outlet side of said pump, an absorbent trap connected with the outlet of said cold trap and arranged to absorb traces of the condensible gas passing through said cold trap, and means for admitting an inert and relatively incondensible gas into said vessel to purge the condensible gas therefrom. 5. A system for recovering uranium hexafluoride gas by solidifying the same in a cold trap that comprises a diffusion cell to be evacuated, a vacuum pump having an inlet and an outlet side and arranged to withdraw said gas from said cell, means connecting said cell with the inlet side of said pump, a refrigerated cold trap for solidifying said gas, said trap having an inlet and an outlet, heating means associated with said cold trap whereby the contents of said trap may be converted to a fluid state, means connecting the inlet of said cold trap with the outlet side of said pump, said means including a filter arranged to remove traces of pump oil from the gas being withdrawn from the cell, a fluorocarbon trap connected with the outlet of said cold trap and arranged to absorb traces of uranium hexafluoride gas passing through the cold trap, means for admitting dry nitrogen gas to said cell to purge the uranium hexafluoride gas therefrom, and means for returning the uranium hexafluoride gas to said cell from said cold trap.
Inventors
- 👤 Manson Benedict
- 👤 William I Thompson
- 👤 Robert L Parrish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:48
CPC Classifications
B; B01; B01D; B01D8/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
A SYSTEM FOR RECOVERING A CONDENSIBLE GAS BY SOLIDIFYING THE SAME IN A COLD TRAP THAT COMPRISES A VESSEL TO BE EVACUATED, A PUMP HAVING AN INLET AND AN OUTLET SIDE AND ARRANGED TO WITHDRAW GAS FROM SAID VESSEL, MEANS CONNECTING SAID VESSEL WITH THE INTAKE SIDE OF SAID PUMP, A REFRIGERATED COLD TRAP FOR SOLIDIFYING SAID GAS, SAID TRAP HAVING AN INLET AND AN OUTLET MEANS CONNECTING THE INLET OF SAID COLD TRAP WITH THE OUTLET SIDE OF SAID PUMP, AN ABSORBENT TRAP CONNECTED WITH THE OUTLET OF SAID COLD TRAP AND ARRANGED TO ABSORB TRACES OF THE CONDENSIBLE GAS PASSING THROUGH SAID COLD TRAP, AND MEANS FOR ADMITTING AN INERT AND RELATIVELY INCONDENSIBLE GAS INTO SAID VESSEL TO PURGE THE CONDENSIBLE GAS THEREFROM.
Claim 2
Independent Claim
125 words
A SYSTEM FOR RECOVERING A CONDENSIBLE GAS BY SOLIDIFYING THE SAME IN A COLD TRAP THAT COMPRISES A VESSEL TO BE EVACUATED, A PUMP HAVING AN INLET AND AN OUTLET SIDE AND ARRANGED TO WITHDRAW GAS FROM SAID VESSEL, MEANS CONNECTING SAID VESSEL WITH THE INTAKE SIDE OF SAID PUMP, A REFRIGERATED COLD TRAP FOR SOLIDIFYING SAID GAS, SAID TRAP HAVING AN INLET AND AN OUTLET MEANS CONNECTING THE INLET OF SAID COLD TRAP WITH THE OUTLET SIDE OF SAID PUMP, AN ABSORBENT TRAP CONNECTED WITH THE OUTLET OF SAID COLD TRAP AND ARRANGED TO ABSORB TRACES OF THE CONDENSIBLE GAS PASSING THROUGH SAID COLD TRAP, AND MEANS FOR ADMITTING AN INERT AND RELATIVELY INCONDENSIBLE GAS INTO SAID VESSEL TO PURGE THE CONDENSIBLE GAS THEREFROM.
Claim 3
Independent Claim
145 words
A system for recovering a condensible gas by solidifying the same in a cold trap that comprises a vessel to be evacuated, a pump having an inlet and an outlet side and arranged to withdraw gas from said vessel, means connecting said vessel with the intake side of said pump, a refrigerated cold trap for solidifying said gas, said trap having an inlet and an outlet, heating means associated with said cold trap whereby the contents of said trap may be converted to a fluid state, means connecting the inlet of said cold trap with the outlet side of said pump, an absorbent trap connected with the outlet of said cold trap and arranged to absorb traces of said condensible gas passing through said cold trap, and means for admitting an inert and relatively incondensible gas into said vessel to purge the condensible gas therefrom.
Claim 4
Independent Claim
145 words
A system for recovering a condensible gas by solidifying the same in a cold trap that comprises a vessel to be evacuated, a pump having an inlet and an outlet side and arranged to withdraw gas from said vessel, means connecting said vessel with the intake side of said pump, a refrigerated cold trap for solidifying said gas, said trap having an inlet and an outlet, heating means associated with said cold trap whereby the contents of said trap may be converted to a fluid state, means connecting the inlet of said cold trap with the outlet side of said pump, an absorbent trap connected with the outlet of said cold trap and arranged to absorb traces of said condensible gas passing through said cold trap, and means for admitting an inert and relatively incondensible gas into said vessel to purge the condensible gas therefrom.
Claim 5
Independent Claim
162 words
A system for recovering a condensible gas by solidifying the same in a cold trap that comprises a vessel to be evacuated, a pump having an inlet and an outlet side and arranged to withdraw gas from said vessel, means connecting said vessel with the inlet side of said pump, a refrigerated cold trap for solidifying said gas, said trap having an inlet and an outlet, heating means associated with said cold trap whereby the contents of said trap may be converted to a fluid state, means connecting the inlet of said cold trap with the outlet side of said pump, an absorbent trap connected with the outlet of said cold trap and arranged to absorb traces of said condensible gas passing through said cold trap, means for admitting an inert and relatively incondensible gas into said vessel to purge the condensible gas therefrom, and storage means associated with said cold trap and arranged to receive the contents thereof in liquid form.
Claim 6
Independent Claim
162 words
A system for recovering a condensible gas by solidifying the same in a cold trap that comprises a vessel to be evacuated, a pump having an inlet and an outlet side and arranged to withdraw gas from said vessel, means connecting said vessel with the inlet side of said pump, a refrigerated cold trap for solidifying said gas, said trap having an inlet and an outlet, heating means associated with said cold trap whereby the contents of said trap may be converted to a fluid state, means connecting the inlet of said cold trap with the outlet side of said pump, an absorbent trap connected with the outlet of said cold trap and arranged to absorb traces of said condensible gas passing through said cold trap, means for admitting an inert and relatively incondensible gas into said vessel to purge the condensible gas therefrom, and storage means associated with said cold trap and arranged to receive the contents thereof in liquid form.
Claim 7
Independent Claim
157 words
A system for recovering a condensible gas by solidifying the same in a cold trap that comprises a vessel to be evacuated, a pump having an inlet and an outlet side and arranged to withdraw gas from said vessel, means connecting said vessel with the inlet side of said pump, a refrigerated cold trap for solidifying said gas said trap having an inlet and an outlet, heating means associated with said cold trap whereby the contents of said trap may be converted to a fluid state, means connecting the inlet of said cold trap with the outlet side of said pump, an absorbent trap connected with the outlet of said cold trap and arranged to absorb traces of said condensible gas passing through said cold trap, means for admitting an inert and relatively incondensible gas into said vessel to purge the condensible gas therefrom, and means for returning said gas from said cold trap to said vessel.
Claim 8
Independent Claim
157 words
A system for recovering a condensible gas by solidifying the same in a cold trap that comprises a vessel to be evacuated, a pump having an inlet and an outlet side and arranged to withdraw gas from said vessel, means connecting said vessel with the inlet side of said pump, a refrigerated cold trap for solidifying said gas said trap having an inlet and an outlet, heating means associated with said cold trap whereby the contents of said trap may be converted to a fluid state, means connecting the inlet of said cold trap with the outlet side of said pump, an absorbent trap connected with the outlet of said cold trap and arranged to absorb traces of said condensible gas passing through said cold trap, means for admitting an inert and relatively incondensible gas into said vessel to purge the condensible gas therefrom, and means for returning said gas from said cold trap to said vessel.
Claim 9
Independent Claim
180 words
A SYSTEM FOR RECOVERING URANIUM HEXAFLUORIDE GAS BY SOLIDIFYING THE SAME IN A COLD TRAP THAT COMPRISES A DIFFUSION CELL TO BE EVACUATED, A VACUUM PUMP HAVING AN INLET AND AN OUTLET SIDE AND ARRANGED TO WITHDRAW SAID GAS FROM SAID CELL, MEANS CONNECTING SAID CELL WITH THE INLET SIDE OF SAID PUMP, A REFRIGERATED COLD TRAP FOR SOLIDIFYING SAID GAS, SAID TRAP HAVING AN INLET AND AN OUTLET, HEATING MEANS ASSOCIATED WITH SAID COLD TRAP WHEREBY THE CONTENTS OF SAID TRAP MAY BE CONVERTED TO A FLUID STATE, MEANS CONNECTING THE INLET OF SAID COLD TRAP WITH THE OUTLET SIDE OF SAID PUMP, SAID MEANS INCLUDING A FILTER ARRANGED TO REMOVE TRACES OF PUMP OIL FROM THE GAS BEING WITHDRAWN FROM THE CELL, A FLUOROCARBON TRAP CONNECTED WITH THE OUTLET OF SAID COLD TRAP AND ARRANGED TO ABSORB TRACES OF URANIUM HEXAFLUORIDE GAS PASSING THROUGH THE COLD TRAP, MEANS FOR ADMITTING DRY NITROGEN GAS TO SAID CELL TO PURGE THE URANIUM HEXAFLUORIDE GAS THEREFROM, AND MEANS FOR RETURNING THE URANIUM HEXAFLUORIDE GAS TO SAID CELL FROM SAID COLD TRAP.
Claim 10
Independent Claim
180 words
A SYSTEM FOR RECOVERING URANIUM HEXAFLUORIDE GAS BY SOLIDIFYING THE SAME IN A COLD TRAP THAT COMPRISES A DIFFUSION CELL TO BE EVACUATED, A VACUUM PUMP HAVING AN INLET AND AN OUTLET SIDE AND ARRANGED TO WITHDRAW SAID GAS FROM SAID CELL, MEANS CONNECTING SAID CELL WITH THE INLET SIDE OF SAID PUMP, A REFRIGERATED COLD TRAP FOR SOLIDIFYING SAID GAS, SAID TRAP HAVING AN INLET AND AN OUTLET, HEATING MEANS ASSOCIATED WITH SAID COLD TRAP WHEREBY THE CONTENTS OF SAID TRAP MAY BE CONVERTED TO A FLUID STATE, MEANS CONNECTING THE INLET OF SAID COLD TRAP WITH THE OUTLET SIDE OF SAID PUMP, SAID MEANS INCLUDING A FILTER ARRANGED TO REMOVE TRACES OF PUMP OIL FROM THE GAS BEING WITHDRAWN FROM THE CELL, A FLUOROCARBON TRAP CONNECTED WITH THE OUTLET OF SAID COLD TRAP AND ARRANGED TO ABSORB TRACES OF URANIUM HEXAFLUORIDE GAS PASSING THROUGH THE COLD TRAP, MEANS FOR ADMITTING DRY NITROGEN GAS TO SAID CELL TO PURGE THE URANIUM HEXAFLUORIDE GAS THEREFROM, AND MEANS FOR RETURNING THE URANIUM HEXAFLUORIDE GAS TO SAID CELL FROM SAID COLD TRAP.
References Cited (Backward Citations)
US1307999A
Cited
US1831644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |