US5212143A
Expired / Lapsed
US
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Hollow porous microspheres made from dispersed particle compositions
Assignee: Individual
•
Filing: 1988-05-05
•
Granted: 1993-05-18
•
Expires: 2008-05-05
Abstract
Abstract Hollow porous microspheres of substantially uniform diameter and of substantially uniform wall thickness are disclosed. The walls of the hollow microspheres comprise sintered together particles which define interconnecting voids within the walls and a single central cavity in the interior of the microspheres and inner and outer microsphere wall surfaces. The interconnecting voids are continuous and extend from the outer wall surface to the inner wall surface. The walls have substantially uniform void content and the interconnecting voids are substantially uniformly distributed in the walls of the hollow microspheres and the walls of the hollow microspheres are free of latent solid or liquid blowing gas materials and are substantially free of relatively thinned wall portions and bubbles.
Inventors
- 👤 Leonard B. Torobin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:11
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/28016; B01J20/28021; B01J13/00; B01J13/02; B01J13/04; B01J13/20; B01J13/22; B22; B22F; B22F1/00; B22F1/06; B22F1/065; B22F1/0655; B22F1/08; B29; B29C; B29C49/00; B29C49/0005; B29C49/0042; B29C49/42; B29C49/46; B29C70/00; B29C70/58; B29C70/66; C; C03; C03B; C03B19/00; C03B19/10; C03B19/107; C03B19/1075; C03B19/108; C03B19/1085; C03B37/00; C03B37/01; C03B37/02; C03B37/022; C03B37/04; C03B37/075; C03B37/0756; C03C; C03C11/00; C03C11/002; C03C17/00; C03C17/06; C03C17/09; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/22; C04B14/24; C04B18/00; C04B18/02; C04B18/027; C04B20/00; C04B20/10; C04B20/1055; C04B38/00; C04B38/08; C04B41/00; C04B41/45; C04B41/4584; C08; C08J; C08J9/00; C08J9/32; E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/267; F; F24; F24S; F24S80/00; F24S80/50; F24S80/52; F24S80/525; F24S80/60; B01J35/00; B01J35/50; B01J35/51; B01J35/52; B29C2049/4602; B29C2049/4605; B29C2049/4608; B29C2049/465; B29C2049/4655; B29C2049/4664; B29K; B29K2105/00; B29K2105/06; B29K2105/16; B29K2105/165; C03B2203/00; C03B2203/10; C03B2203/14; C03B2203/16; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y10; Y10S; Y10S521/00; Y10S521/919; Y10S75/00; Y10S75/953; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
150 words
Hollow porous microspheres having a substantially uniform diameter within the range of 500 to 6,000 microns and having a substantially uniform wall thickness within the range of 5.0 to 400 microns, the walls of said hollow microspheres comprise sintered together particles, said sintered together particles being selected from the group consisting of glass, metal and metal glass particles, which define interconnecting voids within the walls and a single central cavity in the interior of the microspheres and inner and outer microsphere wall surfaces, said interconnecting voids are continuous and extend from the outer wall surface to the inner wall surface, said walls have substantially uniform void content and said interconnecting voids are substantially uniformly distributed in the walls of the hollow microspheres, and the walls of said hollow microspheres are free of latent solid or liquid blowing gas materials and are substantially free of relatively thinned wall portions and bubbles.
Claim 2
Dependent Claim
150 words
Hollow porous microspheres having a substantially uniform diameter within the range of 500 to 6,000 microns and having a substantially uniform wall thickness within the range of 5.0 to 400 microns, the walls of said hollow microspheres comprise sintered together particles, said sintered together particles being selected from the group consisting of glass, metal and metal glass particles, which define interconnecting voids within the walls and a single central cavity in the interior of the microspheres and inner and outer microsphere wall surfaces, said interconnecting voids are continuous and extend from the outer wall surface to the inner wall surface, said walls have substantially uniform void content and said interconnecting voids are substantially uniformly distributed in the walls of the hollow microspheres, and the walls of said hollow microspheres are free of latent solid or liquid blowing gas materials and are substantially free of relatively thinned wall portions and bubbles.
Claim 3
Dependent Claim
20 words
The hollow porous microspheres of claim 1 wherein the walls of the hollow porous microspheres comprise sintered together glass particles.
Claim 4
Dependent Claim
20 words
The hollow porous microspheres of claim 1 wherein the walls of the hollow porous microspheres comprise sintered together metal particles.
Claim 5
Dependent Claim
21 words
The hollow porous microspheres of claim 1 wherein the walls of the hollow porous microspheres comprise sintered together metal glass particles.
Claim 6
Dependent Claim
31 words
The hollow porous microspheres of claim 2, 3 or 4 wherein the sintered together particles comprising the walls of said hollow microspheres have a particle size of 0.5 to 20 microns.
Claim 7
Dependent Claim
27 words
The hollow porous microspheres of claim 2, 3 or 4 wherein the ratio of the microspheres wall thickness to the microsphere outside diamter is 1:10 to 1:300.
Claim 8
Dependent Claim
35 words
The hollow porous microspheres of claim 2, 3 or 4 containing distributed in the walls of said microspheres macro pores which are 5 to 400 microns in size and which extend through the microspheres walls.
Claim 9
Dependent Claim
160 words
Hollow microspheres having a substantially uniform diameter within the range of 500 to 6000 microns and having a substantially uniform wall thickness within the range of 5 to 400 microns, the walls of said hollow microspheres comprise sintered together particles, said sintered together particles being selected from the group consisting of glass, metal and metal glass particles, which define voids within the walls and a single central cavity in the interior of the microspheres and inner and outer microsphere wall surfaces, said voids extend from the outer wall to the inner wall, said walls have substantially uniform void content and said voids are substantially uniformly distributed in the walls of the hollow microspheres, and the walls of said hollow microspheres are free of latent solid or liquid blowing gas material and are substantially free of relatively thinned wall portions and bubbles, wherein the sintered together particles defining the voids have been sintered or fused to close and seal the voids.
Claim 10
Dependent Claim
160 words
Hollow microspheres having a substantially uniform diameter within the range of 500 to 6000 microns and having a substantially uniform wall thickness within the range of 5 to 400 microns, the walls of said hollow microspheres comprise sintered together particles, said sintered together particles being selected from the group consisting of glass, metal and metal glass particles, which define voids within the walls and a single central cavity in the interior of the microspheres and inner and outer microsphere wall surfaces, said voids extend from the outer wall to the inner wall, said walls have substantially uniform void content and said voids are substantially uniformly distributed in the walls of the hollow microspheres, and the walls of said hollow microspheres are free of latent solid or liquid blowing gas material and are substantially free of relatively thinned wall portions and bubbles, wherein the sintered together particles defining the voids have been sintered or fused to close and seal the voids.
Claim 11
Dependent Claim
18 words
The hollow microspheres of claim 8 wherein the walls of the hollow microspheres comprise sintered together glass particles.
Claim 12
Dependent Claim
18 words
The hollow microspheres of claim 8 wherein the walls of the hollow microspheres comprise sintered together metal particles.
Claim 13
Dependent Claim
19 words
The hollow microspheres of claim 8 wherein the walls of the hollow microspheres comprise sintered together metal glass particles.
Claim 14
Dependent Claim
30 words
The hollow microspheres of claim 9, 10 or 11 wherein the sintered together particles comprising the walls of said hollow microspheres have a particle size of 0.5 to 20 microns.
Claim 15
Dependent Claim
26 words
The hollow microspheres of claim 9, 10 or 11 wherein the ratio of the microspheres wall thickness to the microsphere outside diameter is 1:10 to 1:300.
Claim 16
Dependent Claim
178 words
Hollow porous microspheres having a substantially uniform diameter within the range of 500 to 6,000 microns and having a substantially uniform wall thickness within the range of 5.0 to 400 microns, the walls of said hollow microspheres comprise sintered together particles which define interconnecting voids within the walls and a single central cavity in the interior of the microspheres and inner and outer microsphere wall surfaces, said interconnecting voids are continuous and extend from the outer wall surface to the inner wall surface, said walls have substantially uniform void content and said interconnecting voids are substantially uniformly distributed in the walls of the hollow microspheres, and the walls of said hollow microspheres are free of latent solid or liquid blowing gas materials and are substantially free of relatively thinned wall portions and bubbles, wherein there is contained in the interconnecting voids a rigid latticework of small solid particles such that the interconnecting voids contain a porous matrix of said small solid particles to form in the interconnecting voids micro pores defined by said rigid latticework of small particles.
Claim 17
Dependent Claim
178 words
Hollow porous microspheres having a substantially uniform diameter within the range of 500 to 6,000 microns and having a substantially uniform wall thickness within the range of 5.0 to 400 microns, the walls of said hollow microspheres comprise sintered together particles which define interconnecting voids within the walls and a single central cavity in the interior of the microspheres and inner and outer microsphere wall surfaces, said interconnecting voids are continuous and extend from the outer wall surface to the inner wall surface, said walls have substantially uniform void content and said interconnecting voids are substantially uniformly distributed in the walls of the hollow microspheres, and the walls of said hollow microspheres are free of latent solid or liquid blowing gas materials and are substantially free of relatively thinned wall portions and bubbles, wherein there is contained in the interconnecting voids a rigid latticework of small solid particles such that the interconnecting voids contain a porous matrix of said small solid particles to form in the interconnecting voids micro pores defined by said rigid latticework of small particles.
Claim 18
Dependent Claim
20 words
The hollow porous microspheres of claim 14 wherein the walls of the hollow porous microspheres comprise sintered together inorganic particles.
Claim 19
Dependent Claim
20 words
The hollow porous microspheres of claim 14 wherein the walls of the hollow porous microspheres comprise sintered together ceramic particles.
Claim 20
Dependent Claim
20 words
The hollow porous microspheres of claim 14 wherein the walls of the hollow porous microspheres comprise sintered together alumina particles.
Claim 21
Dependent Claim
28 words
The hollow porous microspheres of claim 14 wherein the sintered together particles comprising the walls of said hollow microspheres have a particle size of 0.5 to 20 microns.
Claim 22
Dependent Claim
168 words
Hollow porous microspheres having a substantially uniform diameter within the range of 500 to 6,000 microns and having a substantially uniform wall thickness within the range of 5.0 to 400 microns, the walls of said hollow microspheres comprise sintered together particles which define interconnecting voids within the walls and a single central cavity in the interior of the microspheres and inner and outer microsphere wall surfaces, said interconnecting voids are continuous and extend from the outer wall surface to the inner wall surface, said walls have substantially uniform void content and said interconnecting voids are substantially uniformly distributed in the walls of the hollow microspheres, and the walls of said hollow microspheres are free of latent solid or liquid blowing gas materials and are substantially free of relatively thinned wall portions and bubbles, and having placed in the interconnecting voids in the walls of the microspheres a selective semipermeable membrane such that the interior of the hollow microsphere is closed off from the exterior of the hollow microsphere.
Claim 23
Dependent Claim
168 words
Hollow porous microspheres having a substantially uniform diameter within the range of 500 to 6,000 microns and having a substantially uniform wall thickness within the range of 5.0 to 400 microns, the walls of said hollow microspheres comprise sintered together particles which define interconnecting voids within the walls and a single central cavity in the interior of the microspheres and inner and outer microsphere wall surfaces, said interconnecting voids are continuous and extend from the outer wall surface to the inner wall surface, said walls have substantially uniform void content and said interconnecting voids are substantially uniformly distributed in the walls of the hollow microspheres, and the walls of said hollow microspheres are free of latent solid or liquid blowing gas materials and are substantially free of relatively thinned wall portions and bubbles, and having placed in the interconnecting voids in the walls of the microspheres a selective semipermeable membrane such that the interior of the hollow microsphere is closed off from the exterior of the hollow microsphere.
Claim 24
Dependent Claim
20 words
The hollow porous microspheres of claim 19 wherein the walls of the hollow porous microspheres comprise sintered together inorganic particles.
Claim 25
Dependent Claim
20 words
The hollow porous microspheres of claim 19 wherein the walls of the hollow porous microspheres comprise sintered together ceramic particles.
Claim 26
Dependent Claim
20 words
The hollow porous microspheres of claim 19 wherein the walls of the hollow porous microspheres comprise sintered together alumina particles.
Claim 27
Dependent Claim
20 words
The hollow porous microspheres of claim 19 wherein the walls of the hollow porous microspheres comprise sintered together glass particles.
Claim 28
Dependent Claim
52 words
The hollow porous microspheres of claim 19, 21, or 23 containing distributed in the walls of said microspheres macropores which are 5 to 400 microns in size and which extend through the walls of the microspheres, and having placed in the macropores in the walls of the microspheres a selective semi-permeable membrane.
Claim 29
Dependent Claim
142 words
Hollow porous microsphers having a substantially uniform diameter within the range of 500 to 6,000 microns and having a substantially uniform wall thickness within the range of 5.0 to 400 microns, the walls of said hollow microspheres comprise sintered together particles which define interconnecting voids within the walls and a single central cavity in the interior of the microspheres and inner and outer microsphere wall surfaces, said interconnecting voids are continuous and extend from the outer wall surface to the inner wall surface, said walls have substantially uniform void content and said interconnecting voids are substantially uniformly distributed in the walls of the hollow microspheres, and the walls of said hollow microspheres are free of latent solid or liquid blowing gas materials and are substantially free of relatively thinned wall portions and bubbles, and containing encapsulated therein an adsorbent or absorbent material.
Claim 30
Dependent Claim
142 words
Hollow porous microsphers having a substantially uniform diameter within the range of 500 to 6,000 microns and having a substantially uniform wall thickness within the range of 5.0 to 400 microns, the walls of said hollow microspheres comprise sintered together particles which define interconnecting voids within the walls and a single central cavity in the interior of the microspheres and inner and outer microsphere wall surfaces, said interconnecting voids are continuous and extend from the outer wall surface to the inner wall surface, said walls have substantially uniform void content and said interconnecting voids are substantially uniformly distributed in the walls of the hollow microspheres, and the walls of said hollow microspheres are free of latent solid or liquid blowing gas materials and are substantially free of relatively thinned wall portions and bubbles, and containing encapsulated therein an adsorbent or absorbent material.
Claim 31
Dependent Claim
20 words
The hollow porous microspheres of claim 25 wherein the walls of the hollow porous microspheres comprise sintered together inorganic particles.
Claim 32
Dependent Claim
20 words
The hollow porous microspheres of claim 25 wherein the walls of the hollow porous microspheres comprise sintered together ceramic particles.
Claim 33
Dependent Claim
20 words
The hollow porous microspheres of claim 25 wherein the walls of the hollow porous microspheres comprise sintered together alumina particles.
Claim 34
Dependent Claim
20 words
The hollow porous microspheres of claim 25 wherein the walls of the hollow porous microspheres comprise sintered together glass particles.
Claim 35
Dependent Claim
35 words
The hollow porous microspheres of claim 25, 27 or 29 containing distributed in the walls of said microspheres macro pores which are 5 to 400 microns in size and which extend through the microspheres walls.
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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) | 1996-05-17 | 1996-11-16 | 1997-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-17 | 2000-11-16 | 2001-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-17 | 2004-11-16 | 2005-05-18 | $7700.00 | Window Closed / Lapsed |