US5037859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite foams
Assignee: United States Department of Energy
•
Filing: 1990-08-24
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Granted: 1991-08-06
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Expires: 2010-08-24
Abstract
Abstract Composite foams are provided comprising a first rigid, microcellular, open-celled organic polymer foam having a density of from about 0.015 g/cm3 to about 0.20 g/cm3 and a pore size of from about 1 micron to about 30 microns, said first foam containing a second polymer having a density of from about 0.015 g/cm3 to about 0.20 g/cm3 or a second polymer foam having a density of from about 0.015 g/cm3 to about 0.20 g/cm3 and a pore size of from about 0.01 microns to about 1.0 micron within the open cells of said first foam.
Inventors
- 👤 Joel M. Williams, Jr.
- 👤 Alice M. Nyitray
- 👤 Mark H. Wilkerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:02
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/4582; C04B26/00; C04B26/02; C04B26/04; C04B28/00; C04B28/24; C04B38/00; C08; C08J; C08J9/00; C08J9/35; C08J9/36; C08J9/40; C08J9/42; C08J2205/00; C08J2205/02; C08J2205/026; C08J2205/04; C08J2205/05; C08J2205/052; C08J2425/00; C08J2461/00; Y; Y10; Y10S; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
94 words
A composite foam comprising: a first rigid, microcellular, open-celled organic polymer foam having a density of from about 0.015 g/cm 3 to about 0.20 g/cm 3 and a pore size of from about 1 micron to about 30 microns, said first foam containing a second polymer foam having a density of from about 0.015 g/cm 3 to about 0.60 g/cm 3 and a pore size of from about 0.01 microns to about 1.0 micron within the open cells of said first foam, said second foam having a smaller pore size than said first foam.
Claim 2
Dependent Claim
94 words
A composite foam comprising: a first rigid, microcellular, open-celled organic polymer foam having a density of from about 0.015 g/cm 3 to about 0.20 g/cm 3 and a pore size of from about 1 micron to about 30 microns, said first foam containing a second polymer foam having a density of from about 0.015 g/cm 3 to about 0.60 g/cm 3 and a pore size of from about 0.01 microns to about 1.0 micron within the open cells of said first foam, said second foam having a smaller pore size than said first foam.
Claim 3
Dependent Claim
22 words
The composite foam of claim 1 wherein the second polymer foam coats the walls of the open cells of said first foam.
Claim 4
Dependent Claim
21 words
The composite foam of claim 1 wherein the second polymer foam substantially completely fills the open cells of said first foam.
Claim 5
Dependent Claim
16 words
The composite foam of claim 1 wherein the second polymer foam is an organic polymer foam.
Claim 6
Dependent Claim
15 words
The composite foam of claim 4 wherein the second polymer foam is a closed-cell foam.
Claim 7
Dependent Claim
15 words
The composite foam of claim 4 wherein the second polymer foam is an open-celled foam.
Claim 8
Dependent Claim
53 words
The composite foam of claim 1 wherein the first open-celled organic polymer foam is selected from the group consisting of a polystyrene foam and a carbon foam, and the second polymer foam is selected from the group consisting of a silica aerogel foam, a resorcinol-formaldehyde foam, a phloroglucinol-formaldehyde foam, or a polystyrene foam.
Claim 9
Dependent Claim
38 words
The composite foam of claim 2 wherein the second polymer foam coating on the walls of the open cells of the first foam has a thickness of from about five to 50 angstroms up to about ten microns.
Claim 10
Dependent Claim
25 words
The composite foam of claim 1 wherein the first open-celled polymeric foam has a pore size of from about 1 micron to about 10 microns.
Claim 11
Dependent Claim
108 words
A composite foam material comprising a rigid, microcellular, open-celled foam selected from the group consisting of polystyrene foam or carbon foam having a density of from about 0.015 g/cm 3 to about 0.20 g/cm 3 and a pore size of from about 1 micron to about 30 microns, said polystyrene or carbon foam containing a second polymeric foam material having a density of from about 0.001 g/cm 3 to about 0.60 g/cm 3 and a pore size of from about 0.01 microns to about 1.0 micron within the open cells of the polystyrene or carbon foam, said second foam having a smaller pore size than said first foam.
Claim 12
Dependent Claim
108 words
A composite foam material comprising a rigid, microcellular, open-celled foam selected from the group consisting of polystyrene foam or carbon foam having a density of from about 0.015 g/cm 3 to about 0.20 g/cm 3 and a pore size of from about 1 micron to about 30 microns, said polystyrene or carbon foam containing a second polymeric foam material having a density of from about 0.001 g/cm 3 to about 0.60 g/cm 3 and a pore size of from about 0.01 microns to about 1.0 micron within the open cells of the polystyrene or carbon foam, said second foam having a smaller pore size than said first foam.
Claim 13
Dependent Claim
25 words
The composite foam of claim 10 wherein the second polymeric foam material coats the walls of the open cells of the polystyrene or carbon foam.
Claim 14
Dependent Claim
24 words
The composite foam of claim 10 wherein the second polymeric foam material substantially completely fills the open cells of the polystyrene or carbon foam.
Claim 15
Dependent Claim
109 words
A cryogenic inertial confinement fusion target comprising a sphere composed of a first rigid, microcellular, open-celled foam selected from the group consisting of polystyrene and carbon foams, having a density of from about 0.015 g/cm 3 to about 0.10 g/cm 3 and a pore size of from about 1 micron to about 30 microns, said foam containing a second polymeric foam material having a density of from about 0.01 g/cm 3 to about 0.1 g/cm 3 and a pore size of from about 0.01 microns to about 1.0 microns within the open cells of the open-celled foam, said second foam having a smaller pore size than said first foam.
Claim 16
Dependent Claim
109 words
A cryogenic inertial confinement fusion target comprising a sphere composed of a first rigid, microcellular, open-celled foam selected from the group consisting of polystyrene and carbon foams, having a density of from about 0.015 g/cm 3 to about 0.10 g/cm 3 and a pore size of from about 1 micron to about 30 microns, said foam containing a second polymeric foam material having a density of from about 0.01 g/cm 3 to about 0.1 g/cm 3 and a pore size of from about 0.01 microns to about 1.0 microns within the open cells of the open-celled foam, said second foam having a smaller pore size than said first foam.
Claim 17
Dependent Claim
36 words
The target of claim 13 wherein the open-celled foam has a density of from about 0.015 g/cm 3 to about 0.05 g/cm 3 and a pore size of from about 1 micron to about 6 microns.
Claim 18
Dependent Claim
81 words
A composite foam material comprising a rigid, microcellular, open-celled organic polymer foam having a density of from about 0.015 g/cm 3 to about 0.20 g/cm 3 and a pore size of from about 1 micron to about 30 microns, said organic polymer containing another polymer material having a density of from about 0.001 g/cm 3 to about 0.60 g/cm 3 coating the walls of said organic polymer foam, said second mentioned polymer having a smaller pore size than said first foam.
Claim 19
Dependent Claim
81 words
A composite foam material comprising a rigid, microcellular, open-celled organic polymer foam having a density of from about 0.015 g/cm 3 to about 0.20 g/cm 3 and a pore size of from about 1 micron to about 30 microns, said organic polymer containing another polymer material having a density of from about 0.001 g/cm 3 to about 0.60 g/cm 3 coating the walls of said organic polymer foam, said second mentioned polymer having a smaller pore size than said first foam.
Claim 20
Dependent Claim
26 words
The composite foam of claim 15 wherein the rigid, microcellular, open-celled polymeric foam has a pore size of from about 1 micron to about 10 microns.
Claim 21
Dependent Claim
27 words
The composite foam of claim 16 wherein the rigid, microcellular, open-celled polymeric foam is selected from the group consisting of a polystyrene foam or a carbon foam.
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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) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |