Patent US3646950A successfully refreshed from Google Patents.
US3646950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing pressure and controlling flow rate of a fluid under high pressure
Assignee: Japan Atomic Energy Agency
•
Filing: 1969-04-01
•
Granted: 1972-03-07
•
Expires: 1989-04-01
Abstract
Abstract The pressure of a fluid under high pressure can be reduced as the flow rate of said fluid is kept at an arbitrarily selected value by passing said fluid through a circuit comprising a long tubing or a reduction nozzle or series of nozzles and introducing a flow rate controlling medium into said circuit.
Inventors
- 👤 Masaaki Takehisa
- 👤 Waichiro Kawakami
- 👤 Hayato Nakajima
- 👤 Yoshihiko Hosaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:41
CPC Classifications
F; F17; F17D; F17D1/00; F17D1/08; F17D1/16; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391; Y10T137/0396
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
77 words
A method of reducing the pressure in a high-pressure fluid system and controlling the flow rate of the fluid in said system by passing the fluid through a pressure-reduction circuit, comprising the steps of introducing a liquid flow rate controlling medium into said circuit, the medium being in the liquid state under the temperature and pressure conditions in the circuit, and regulating the flow rate of the liquid medium to reduce the flow rate of the fluid.
Claim 2
Independent Claim
77 words
A method of reducing the pressure in a high-pressure fluid system and controlling the flow rate of the fluid in said system by passing the fluid through a pressure-reduction circuit, comprising the steps of introducing a liquid flow rate controlling medium into said circuit, the medium being in the liquid state under the temperature and pressure conditions in the circuit, and regulating the flow rate of the liquid medium to reduce the flow rate of the fluid.
Claim 3
Dependent Claim
13 words
In the method of claim 1, the fluid being in a gaseous phase.
Claim 4
Dependent Claim
13 words
In the method of claim 1, the fluid being a two-phase gas-liquid system.
Claim 5
Dependent Claim
11 words
In the method of claim 1 the fluid being a slurry.
Claim 6
Dependent Claim
20 words
In the method of claim 1, the fluid being in a liquid phase consisting of at least two immiscible liquids.
Claim 7
Dependent Claim
12 words
In the method of claim 1, the fluid being a gas-liquid-solid system.
Claim 8
Dependent Claim
14 words
In the method of claim 1, the liquid medium being immiscible with the fluid.
Claim 9
Dependent Claim
20 words
In the method of claim 1, the fluid being a compressible gas and the pressure-reduction circuit being a long tubing.
Claim 10
Dependent Claim
22 words
In the method of claim 1, the fluid being a liquefied gas and the liquid medium is miscible with the liquefied gas.
Claim 11
Dependent Claim
36 words
In the method of claim 1, the fluid being a slurry comprising a liquefied gas and a powder material, the liquid medium is miscible with the liquefied gas, and the pressure-reduction circuit is a long tubing.
Claim 12
Dependent Claim
21 words
In the method of claim 9, the liquid medium being selected from the group consisting of water, methanol and mixtures thereof.
Claim 13
Dependent Claim
20 words
In the method of claim 11, the slurry comprising ethylene, methanol and polyethylene powder, and the liquid medium being methanol.
Claim 14
Dependent Claim
30 words
In the method of claim 1, the fluid being selected from the group consisting of ethylene, nitrogen, carbon dioxide, an ethylene-polyethylene slurry, an ethylene-methanol-polyethylene powder slurry, and a dichlorodifluoromethane-water mixture.
Claim 15
Dependent Claim
40 words
In the method of claim 1, the flUid being a mixture of a polymerization product and unreacted residues being conducted through a pressure-reducing circuit out of a high-pressure reactor in which at least one monomer is polymerized under high pressure.
Claim 16
Dependent Claim
22 words
In the method of claim 14, wherein the mixture comprises the polymerization product, at least one unreacted monomer, and a polymerization medium.
Claim 17
Dependent Claim
12 words
In the method of claim 14, wherein the polymerization product is polyethylene.
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |