US4846988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for bringing bodies immersed in liquid to form regular structural patterns
Assignee: Henkel Loctite Corp
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Filing: 1987-12-10
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Granted: 1989-07-11
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Expires: 2007-12-10
Abstract
Abstract Method and device for bringing bodies immersed in liquid to form regular structural patterns which may influence electromagnetic and acoustic waves, simulate states and processes in atomic or molecular structures and the like. This is achieved by means of a great number of non-magnetic, essentially monodisperse particles dispersed in a magnetic liquid, which is subjected to an essentially homogeneous magnetic field. Each of the dispersed non-magnetic particle bodies then assumes a magnetic moment corresponding to the volume of liquid displaced by the body, but inversely directed. Magnetic interaction forces would then prevail between the particle bodies, which thus may be collectively controlled by the external magnetic field to assume various suitable structural patterns.
Inventors
- 👤 Arne T. Skjeltorp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:04
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/26
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
128 words
A method of providing a regular, structural pattern of particles in a liquid, the method consisting essentially of the steps of (a) dispersing a plurality of non-magnetic, monodisperse particles having uniform sizes and shapes in a magnetic liquid confined in an interspace between two surfaces which are spaced apart a distance that ranges from a largest dimension of said particles to double said largest dimension, said particles creating non-magnetic cavites within said magnetic liquid which have identical sizes and shapes, and (2) applying a substantially homogeneous magnetic field to said magnetic liquid and said particles in said interspace from a certain direction so that said particles will move within said magnetic liquid in said interspace to form a regular, structural pattern within said magnetic liquid in said interspace.
Claim 2
Independent Claim
128 words
A method of providing a regular, structural pattern of particles in a liquid, the method consisting essentially of the steps of (a) dispersing a plurality of non-magnetic, monodisperse particles having uniform sizes and shapes in a magnetic liquid confined in an interspace between two surfaces which are spaced apart a distance that ranges from a largest dimension of said particles to double said largest dimension, said particles creating non-magnetic cavites within said magnetic liquid which have identical sizes and shapes, and (2) applying a substantially homogeneous magnetic field to said magnetic liquid and said particles in said interspace from a certain direction so that said particles will move within said magnetic liquid in said interspace to form a regular, structural pattern within said magnetic liquid in said interspace.
Claim 3
Dependent Claim
31 words
A method as claimed in claim 1, including the step of changing the direction from which said substantially homogeneous magnetic field is applied to said magnetic liquid and said particles therein.
Claim 4
Dependent Claim
29 words
A method as claimed in claim 1, including the step of varying the intensity of said substantially homogeneous magnetic field applied to said magnetic liquid and said particles therein.
Claim 5
Dependent Claim
14 words
A method as claimed in claim 1, wherein said non-magnetic, monodisperse particles are spheroids.
Claim 6
Dependent Claim
16 words
A method as claimed in claim 4, wherein said non-magnetic, monodisperse particles are made of plastic.
Claim 7
Dependent Claim
16 words
A method as claimed in claim 5, wherein said regular, structural pattern is a triangular lattice.
Claim 8
Dependent Claim
89 words
The combination of a magnetic liquid having non-magnetic, monodisperse particles located in an interspace between two surfaces which are spaced apart a distance that ranges from an largest dimension of said particles to double said largest dimension and a device for forming the non-magnetic, monodisperse particles into a regular, structural pattern within said interspace, said particles consisting of non-magnetic, monodisperse particles having uniform sizes and shapes and said device including magnetizing means for applying a substantially homogeneous magnetic field to said magnetic liquid containing said particles in said interspace.
Claim 9
Dependent Claim
89 words
The combination of a magnetic liquid having non-magnetic, monodisperse particles located in an interspace between two surfaces which are spaced apart a distance that ranges from an largest dimension of said particles to double said largest dimension and a device for forming the non-magnetic, monodisperse particles into a regular, structural pattern within said interspace, said particles consisting of non-magnetic, monodisperse particles having uniform sizes and shapes and said device including magnetizing means for applying a substantially homogeneous magnetic field to said magnetic liquid containing said particles in said interspace.
Claim 10
Dependent Claim
32 words
The combination as defined in claim 7, wherein said two surfaces comprise two parallel plates which have at least one surface dimension that is greater than the thickness dimension of said interspace.
Claim 11
Dependent Claim
43 words
The combination as defined in claim 8, wherein said magnetizing means includes means for varying the intensity of said substantially homogeneous magnetic field applied to the interspace between said two parallel plates and thus to the magnetic liquid and non-magnetic, monodisperse particles therein.
Claim 12
Dependent Claim
14 words
The combination as defined in claim 7, wherein said non-magnetic monodisperse particles are spheroids.
Claim 13
Dependent Claim
18 words
The combination as defined in claim 10, wherein said non-magnetic monodisperse particles are made of a plastic material.
Claim 14
Dependent Claim
13 words
The combination as defined in claim 11, wherein said plastic material is polystyrene.
Claim 15
Dependent Claim
17 words
The combination as defined in claim 10, wherein said particles have diameters between 1 and 20 μm.
Claim 16
Dependent Claim
24 words
The combination as defined in claim 7, wherein said magnetic liquid is a colloidal suspension of ferro-magnetic monodomain particles in a non-magnetic carrier liquid.
Claim 17
Dependent Claim
22 words
The combination as defined in claim 14, wherein said non-magnetic carrier liquid is selected from the group consisting of kerosene and water.
Claim 18
Dependent Claim
20 words
The combination as defined in claim 14, wherein said ferromagnetic monodomain particles are substantially smaller than said non-magnetic, monodisperse particles.
Claim 19
Dependent Claim
20 words
The combination as defined in claim 16, wherein said ferromagnetic monodomain particles have a mean size of about 0.01 μm.
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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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |