US5312571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped bodies and the production thereof
Assignee: Saint Gobain Abrasives Inc
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Filing: 1993-01-07
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Granted: 1994-05-17
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Expires: 2013-01-07
Abstract
Abstract A method of making shaped, gelled bodies, comprising: (1) producing a mixture comprising a first liquid, a granular substance or precursor thereof, and a gelation compound which quickly gels at a gelation temperature, and (2) introducing portions of the mixture into a first fluid in which the first liquid is immiscible, said first fluid having a temperature of about the gelation temperature, thereby causing the portions to take on a shape and then gel to form shaped, gelled bodies.
Inventors
- 👤 Vimal K. Pujari
- 👤 Gulio Rossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:03
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/624; B; B01; B01J; B01J37/00; B01J37/0072; B01J37/02; B01J37/03; B01J37/036; C04B35/515; C04B35/58; C04B35/584; C04B35/593
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
79 words
A method of making shaped, gelled bodies, comprising: (1) producing a mixture comprising a first liquid, a granular substance or precursor thereof, and a gelation compound which quickly gels at a gelation temperature, and (2) introducing portions of the mixture into a first fluid in which the first liquid is immiscible, said first fluid having a temperature of about the gelation temperature, thereby causing the portions to take on a shape and then gel to form shaped, gelled bodies.
Claim 2
Independent Claim
79 words
A method of making shaped, gelled bodies, comprising: (1) producing a mixture comprising a first liquid, a granular substance or precursor thereof, and a gelation compound which quickly gels at a gelation temperature, and (2) introducing portions of the mixture into a first fluid in which the first liquid is immiscible, said first fluid having a temperature of about the gelation temperature, thereby causing the portions to take on a shape and then gel to form shaped, gelled bodies.
Claim 3
Dependent Claim
13 words
The method of claim 1, wherein the first liquid comprises a polar compound.
Claim 4
Dependent Claim
11 words
The method of claim 2, wherein the polar compound comprises water.
Claim 5
Dependent Claim
15 words
The method of claim 1, wherein the granular substance or precursor thereof is a powder.
Claim 6
Dependent Claim
12 words
The method of claim 4, wherein the powder comprises a ceramic powder.
Claim 7
Dependent Claim
12 words
The method of claim 5, wherein the ceramic powder comprises silicon nitride.
Claim 8
Dependent Claim
21 words
The method of claim 6, wherein the silicon nitride is present in the slurry in the amount of about 25 w/o.
Claim 9
Dependent Claim
12 words
The method of claim 1, wherein the gelation compound comprises an agaroid.
Claim 10
Dependent Claim
10 words
The method of claim 8, wherein the agaroid comprises agarose.
Claim 11
Dependent Claim
13 words
The method of claim 1, wherein the gelation compound gels within 5 seconds.
Claim 12
Dependent Claim
17 words
The method of claim 1, wherein the gelation compound gels at a temperature of about 0° C.
Claim 13
Dependent Claim
13 words
The method of claim 1, wherein the first fluid is a second liquid.
Claim 14
Dependent Claim
13 words
The method of claim 12, wherein the second liquid is a non-polar liquid.
Claim 15
Dependent Claim
12 words
The method of claim 13, wherein the non-polar liquid is an oil.
Claim 16
Dependent Claim
11 words
The method of claim 1, wherein the mixture is a slurry.
Claim 17
Dependent Claim
10 words
The method of claim 1, wherein the portions are droplets.
Claim 18
Dependent Claim
13 words
The method of claim 1, wherein the shaped, gelled bodies are green bodies.
Claim 19
Dependent Claim
11 words
The method of claim 17, wherein the green bodies are spheres.
Claim 20
Dependent Claim
34 words
The method of claim 1, further comprising: (3) washing the shaped, gelled bodies in a second fluid which can extract the first liquid from the shaped, gelled bodies, thus densifying the shaped, gelled bodies.
Claim 21
Dependent Claim
13 words
The method of claim 19, wherein the second fluid is a hygroscopic liquid.
Claim 22
Dependent Claim
11 words
The method of claim 20, wherein the hygroscopic liquid is 2-ethylhexanol.
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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) | 1997-05-16 | 1997-11-15 | 1998-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-16 | 2001-11-15 | 2002-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-16 | 2005-11-15 | 2006-05-17 | $7700.00 | Window Closed / Lapsed |