US3923461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method employing gas-permeable membrane for separating, diluting, or concentrating molecular species
Assignee: Meloy Laboratories Inc
•
Filing: 1974-06-07
•
Granted: 1975-12-02
•
Expires: 1994-06-07
Abstract
Abstract A fluid permeation device employs a membrane separating sample gas and carrier gas flow paths at opposite sides thereof, the flow of carrier gas being interrupted from time to time to permit the accumulation of sample gas species which permeate the membrane, and the carrier gas flow being reinstituted to transport the accumulated sample gas species to an analyzer. Greater concentration of sample gas species in the carrier gas is thereby provided.
Inventors
- 👤 James D Barden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:45
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0011; Y; Y10; Y10T; Y10T436/00; Y10T436/18; Y10T436/25; Y10T436/25375; Y10T436/255
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
143 words
APPARATUS FOR CONTROLLING THE CONCENTRATION OF SAMPLE FLUID SPECIES IN A CARRIER FLUID SUPPLIED TO A DEVICE UTILIZING AAID SPEICIES, WHICH COMPRISES MEANS PROVIDING A FLUID PERMEABLE WALL SEPARATING SAMPLE FLUID FLOW AND CARRIER FLUID FLOW PATHS AT OPPOSITE SIDES THEREOF, MEANS FOR CONNECTING SAID CARRIER FLUID FLOW PATH TO SAID DEVICE DOWNSTREAM OF SAID APPARATUS, MEANS FOR SUPPLYING SAMPLE FLUID TO SAID SAMPLE FLUID FLOW PATH, MEANS FOR SUPPLYING A CARRIER FLUID STREAM TO SAID CARRIER FLUID FLOW PATH AND THEN TO SAID DEVICE, AND MEANS FOR INTERRUPTING THE FLOW OF CARRIER FLUID IN THE LAST-MENTIONED PATH FROM TIME TO TIME AND FOR REINSTITUTING THAT FLOW, WHEREBY SAMPLE SPECIES WHICH PERMEATE SAID WALL DURING THE TIME OF CARRIER FLUID INTERRUPTION ACCUMULATE AT THE CARRIER FLUID SIDE OF SAID WALL UNTIL THE CARIER FLUID FLOW FROM SAID STREAM TO SAID DEVICE IS REINSTITUTED.
Claim 2
Dependent Claim
143 words
APPARATUS FOR CONTROLLING THE CONCENTRATION OF SAMPLE FLUID SPECIES IN A CARRIER FLUID SUPPLIED TO A DEVICE UTILIZING AAID SPEICIES, WHICH COMPRISES MEANS PROVIDING A FLUID PERMEABLE WALL SEPARATING SAMPLE FLUID FLOW AND CARRIER FLUID FLOW PATHS AT OPPOSITE SIDES THEREOF, MEANS FOR CONNECTING SAID CARRIER FLUID FLOW PATH TO SAID DEVICE DOWNSTREAM OF SAID APPARATUS, MEANS FOR SUPPLYING SAMPLE FLUID TO SAID SAMPLE FLUID FLOW PATH, MEANS FOR SUPPLYING A CARRIER FLUID STREAM TO SAID CARRIER FLUID FLOW PATH AND THEN TO SAID DEVICE, AND MEANS FOR INTERRUPTING THE FLOW OF CARRIER FLUID IN THE LAST-MENTIONED PATH FROM TIME TO TIME AND FOR REINSTITUTING THAT FLOW, WHEREBY SAMPLE SPECIES WHICH PERMEATE SAID WALL DURING THE TIME OF CARRIER FLUID INTERRUPTION ACCUMULATE AT THE CARRIER FLUID SIDE OF SAID WALL UNTIL THE CARIER FLUID FLOW FROM SAID STREAM TO SAID DEVICE IS REINSTITUTED.
Claim 3
Dependent Claim
11 words
Apparatus in accordance with claim 1, said device comprising analyzer means.
Claim 4
Dependent Claim
34 words
Apparatus in accordance with claim 2, wherein said means for supplying said sample fluid comprises a source of sulfur species in a hydrocarbon stream, and wherein said analyzer means comPrises a flame photometric detector.
Claim 5
Dependent Claim
30 words
Apparatus in accordance with claim 2, wherein said interrupting means comprises valve means for isolating a portion of the carrier fluid flow path in the vicinity of said permeable wall.
Claim 6
Dependent Claim
21 words
Apparatus in accordance with claim 4, further comprising means for supplying carrier fluid directly to said analyzer means during said isolating.
Claim 7
Independent Claim
120 words
A method of controlling the concentration of sample fluid species in a carrier fluid supplied to a device utilizing said species, which comprises providing a fluid permeable wall separating sample fluid flow and carrier fluid flow paths at opposite sides thereof, supplying sample fluid to said sample fluid flow path, supplying a carrier fluid stream to said carrier fluid flow path and then to said device, interrupting the flow of carrier fluid in the last-mentioned path from time to time and reinstituting that flow, whereby sample species which permeate said wall during the time of carrier fluid interruption accumulate at the carrier fluid side of said wall until the carrier fluid flow from said stream to said device is reinstituted.
Claim 8
Independent Claim
120 words
A method of controlling the concentration of sample fluid species in a carrier fluid supplied to a device utilizing said species, which comprises providing a fluid permeable wall separating sample fluid flow and carrier fluid flow paths at opposite sides thereof, supplying sample fluid to said sample fluid flow path, supplying a carrier fluid stream to said carrier fluid flow path and then to said device, interrupting the flow of carrier fluid in the last-mentioned path from time to time and reinstituting that flow, whereby sample species which permeate said wall during the time of carrier fluid interruption accumulate at the carrier fluid side of said wall until the carrier fluid flow from said stream to said device is reinstituted.
Claim 9
Dependent Claim
21 words
A method in accordance with claim 6, further comprising analyzing the fluid flow from said carrier fluid stream by analyzer means.
Claim 10
Dependent Claim
34 words
A method in accordance with claim 7, wherein said sample fluid is supplied from a source of sulfur species in a hydrocarbon stream, and wherein said analyzing is effected by a flame photometric detector.
Claim 11
Dependent Claim
27 words
A method in accordance with claim 7, wherein said interrupting comprises isolating a portion of the carrier fluid flow path in the vicinity of said permeable wall.
Claim 12
Dependent Claim
20 words
A method in accordance with claim 9, further comprising supplying carrier fluid directly to said analyzer means during said isolating.
References Cited (Backward Citations)
US2045379A
Cited
US2664779A
Cited
US3239996A
Cited
US3438241A
Cited
US3534528A
Cited
US3674435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |