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 Title: |
US5308944:
Apparatus and method for microwave treatment of process liquids
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Stone-Elander, Sharon A.; S-182 46 Enebyberg, Sweden
Elander, Nils; S-182 46 Enebyberg, Sweden
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| Assignee: |
None
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| Published / Filed: |
1994-05-03
/ 1992-12-11
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| Application Number: |
US1992000952542
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| IPC Code: |
Advanced:
B01J 19/12;
H05B 6/64;
H05B 6/80;
Core:
more...
IPC-7:
H05B 6/70;
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| ECLA Code: |
B01J19/12D6; H05B6/64; H05B6/80;
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| U.S. Class: |
Current:
219/687;
219/693;
219/696;
219/750;
422/021;
Original:
219/687;
219/750;
219/696;
219/693;
422/021;
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| Field of Search: |
219/10.55 A,10.55 R,10.55 F,10.55 E,10.55 M
422/021
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| Priority Number: |
| 1990-06-14 |
SE1990000002117 |
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| Abstract: |
A microwave device for treating process liquids, preferably precursors to radiopharmaceuticals, with microwave radiation, with the intention of reducing reaction time and increasing reaction yield. The method and the device are characterized in that the geometry of the microwave cavity is varied proportionally to the geometry of the sample container in order to concentrate the microwave field within the container. The reaction time can also be shortened and the reaction yield also increased by varying the microwave field energy or microwave field frequency. The reaction time can also be decreased by adding salts to the process liquid or by adapting the frequency of the microwave field to the resonance frequency of the process liquid in the microwave spectrum.
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| Attorney, Agent or Firm: |
Young & Thompson ;
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| Primary / Asst. Examiners: |
Leung, Philip H.;
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| Maintenance Status: |
E3 Expired Check current status
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
BE CH DK ES FR GB IT LI NL FI HU KR NO US
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| Family: |
Show 17 known family members
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First Claim:
Show all 12 claims |
We claim:
1. A microwave device for treating process liquids, comprising
- an elongated microwave cavity which is formed by a tube having a tubular wall and two opposing end-walls;
- means coupled to said two opposing end walls for moving said two opposing end walls along a longitudinal axis of said tube;
- an antenna for radiating a microwave field, said antenna extending into said elongated microwave cavity between said two opposing end walls;
- a first opening and an opposite second opening each of which perforate the tubular wall and each of which is located above midway between one end of said tubular wall and an opposite end of said tubular wall;
- two coaxial bars, each coaxial bar extending through a respective end-wall towards the center of the tube, said two coaxial bars being disposed centrally in the tube and having two mutually facing end surfaces,
- a sample container which is intended to be filled with process liquid and to be inserted in said first opening and said opposite second opening to subject said process liquid to the influence of the microwave field in said elongated microwave cavity; and
- means for adjusting the distance between said mutually facing end surfaces of said two coaxial bars to concentrate said microwave field within said sample container.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
Show description
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| PCT Number: |
PCT/SE91/00426
WO9120169
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| PCT Pub./Filed Dates: |
1991-12-26 / 1991-06-12
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| § 371 / 102(e) Dates: |
1992-12-11 / 1992-12-11
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| Forward References: |
Show 15 U.S. patent(s) that reference this one
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| Foreign References: |
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PDF |
Publication |
Date |
IPC Code |
Assignee |
Title |
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DE2507408
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1975-02 |
B23K 9/06
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Stiftelsen Institutet foer Mikrovaagsteknik vid Tekniska Hoegskolan, Stockholm
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Mikrowellenheizvorrichtung |
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| Other Abstract Info: |
DERABS C1991-272058
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| Other References: |
The Use of Microwave Ovens for Rapid Organic Synthesis, Gedye et al., Tetrahedron Letters, vol. 27, No. 3, pp. 279-282, 1986 Printed in Great Britain.
(4 pages)
Cited by 4 patents
On-Line Production of 13 N-Nitrogen Gas from a Solid Enriched C-Target and Its Application to 13 N-Ammonia Synthesis Using Microwave Radiation, Ferrieri et al., Int. J. Appl. Radiat. Isot, vol. 34, No. 6 pp. 897-900, 1983, Printed in Great Britain.
(4 pages)
Cited by 3 patents
Synthesis of F18-Fluorine Gas from No Carrier Added F18-HF, M. G. Straatmann, D. J. Schlyer, and J. Chasko. The Cyclotron Corporation, Journal of Labelled Compounds and Radiopharmaceuticals-vol. XIX, Nos. 11-12 p. 1373.
Production of No-Carrier-Added 11 C-Carbon Disulfide and 11 C-Hydrogen Cyanide by Microwave Discharge, Niisawa et al., Int J. Appl. Radiat, Isot. vol. 35, No. 1 pp. 29-33, 1984, Printed in Great Britain.
(5 pages)
Application of Microwave Technology to the Synthesis of Short-Lived Radiopharmaceuticals, D. R. Hwang, S. M. Moerlein, L. Lang, and M. J. Welch J. Chem. Soc., Chem. Commun., 1987 pp. 1799-1801.
(3 pages)
Application of Commercial Microwave Ovens to Organic Synthesis. Raymond J. Giguere, Terry L. Bray, and Scott M. Duncan, Tetrahedron Letters, vol. 27, No. 41, pp. 4945-4948, 1986 Printed in Great Britain.
(4 pages)
Cited by 3 patents
Microwaves in Organic and Organometallic Synthesis, R. Gedye, F. Smith, and K. Westaway, International Microwave Power Institute Journal of Microwave Power and Electromagnetic Energy vol. 26, No. 1, 1991, pp. 3-17.
(15 pages)
[ISI abstract]
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