US4681740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the chemical reaction by wet process of various products
Assignee: CEM Corp
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Filing: 1985-02-27
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Granted: 1987-07-21
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Expires: 2005-02-27
Abstract
Abstract The present invention relates to an apparatus for the chemical reaction of compounds, wherein said apparatus comprises: sample container means having an enlarged sample containing portion at a lower end thereof and an upwardly extending neck portion, a housing defining a microwave heating chamber having an upper wall and defining in said upper wall an opening and a stack bordering said opening and rising to a height forming an absorption barrier to micro-waves. The invention is more particularly applicable to a reaction of mineralization.
Inventors
- 👤 Roger Commarmot
- 👤 Dominique Didenot
- 👤 Jean-Francois Gardais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:07
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/126; H; H05; H05B; H05B6/00; H05B6/64; H05B6/80
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
An apparatus for wet process chemical reactions comprising (i) a micro-wave generator for emitting micro-waves into a micro-wave heating chamber, (ii) a micro-wave heating chamber adapted to contain a sample of product to be heated to form a composition by association with at least one specific reagent, said micro-wave heating chamber comprising a wave guide into which said micro-wave generator emits, said wave guide having an upper wall and defining in said upper wall an opening and wherein an end of the wave guide, located opposite the micro-wave generator with respect to the opening, is equipped with a water trap chamber, (iii) sample container means having an enlarged sample containing portion at a lower end thereof disposed within said micro-wave heating chamber and an upwardly extending neck portion extending through said opening in said upper wall of such micro-wave heating chamber, and (iv) a stack bordering said opening in said upper wall of said micro-wave heating chamber and rising to a height which is sufficient to form an absorption barrier opposing the propagation of micro-waves outside the micro-wave heating chamber.
Claim 2
Independent Claim
180 words
An apparatus for wet process chemical reactions comprising (i) a micro-wave generator for emitting micro-waves into a micro-wave heating chamber, (ii) a micro-wave heating chamber adapted to contain a sample of product to be heated to form a composition by association with at least one specific reagent, said micro-wave heating chamber comprising a wave guide into which said micro-wave generator emits, said wave guide having an upper wall and defining in said upper wall an opening and wherein an end of the wave guide, located opposite the micro-wave generator with respect to the opening, is equipped with a water trap chamber, (iii) sample container means having an enlarged sample containing portion at a lower end thereof disposed within said micro-wave heating chamber and an upwardly extending neck portion extending through said opening in said upper wall of such micro-wave heating chamber, and (iv) a stack bordering said opening in said upper wall of said micro-wave heating chamber and rising to a height which is sufficient to form an absorption barrier opposing the propagation of micro-waves outside the micro-wave heating chamber.
Claim 3
Dependent Claim
38 words
The apparatus of claim 1, further comprising an annular chamber surrounding the stack which is in communication with a circuit for the circulation of a fluid to regulate the temperature of the neck of the sample container means.
Claim 4
Dependent Claim
24 words
The apparatus of claim 1, wherein said sample containing portion of said sample container means is in the form of a substantially spherical bulb.
Claim 5
Dependent Claim
45 words
The apparatus of claim 1, wherein the opening in the upper wall of the micro-wave heating chamber is located at a distance from the plane of emission of the micro-wave generator corresponding substantially to a zone of formation of an antinode of the waves emitted.
Claim 6
Dependent Claim
22 words
The apparatus of claim 1, wherein the water trap chamber is connected to the outlet of the annular chamber of the stack.
Claim 7
Dependent Claim
38 words
The apparatus of claim 1, wherein said neck portion has a length greater than the height of the stack and is provided at its upper end with a stopper for support and centering with respect to the stack.
Claim 8
Dependent Claim
25 words
The apparatus of claim 6, wherein the stopper serves as a seat for supporting a cover or hood for aspiration of the vapours and fumes.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |