US4629652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aerogels on a support
Assignee: Honeywell International Inc
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Filing: 1984-10-01
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Granted: 1986-12-16
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Expires: 2004-10-01
Abstract
Abstract A widely applicable and simple technique has been discovered for preparing aerogels in more durable forms. By the exposure of a variety of support structures to a pregel heated to hypercritical conditions, the resulting aerogel is produced and retained on the supporting structure. Thus, the aerogels are prepared and "pelletized" in one step.
Inventors
- 👤 Emery J. Carlson
- 👤 John N. Armor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:17
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0052; B01J13/0091; B01J37/00; B01J37/02; B01J37/03; B01J37/036; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249978; Y10T428/25; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
A process for the production of products comprising aerogels, the process comprising the steps of: (a) producing a pregel comprising a reaction liquid and an aerogel-forming composition; (b) heating the pregel to hypercritical conditions such that the reaction liquid is converted to a fluid phase; (c) venting the fluid phase under hypercritical conditions to yield an aerogel; and (d) exposing an object to the aerogel-forming composition prior to venting to cause the aerogel to collect on the object.
Claim 2
Dependent Claim
78 words
A process for the production of products comprising aerogels, the process comprising the steps of: (a) producing a pregel comprising a reaction liquid and an aerogel-forming composition; (b) heating the pregel to hypercritical conditions such that the reaction liquid is converted to a fluid phase; (c) venting the fluid phase under hypercritical conditions to yield an aerogel; and (d) exposing an object to the aerogel-forming composition prior to venting to cause the aerogel to collect on the object.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the object has an open form.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the object is exposed to the aerogel-forming composition prior to heating the pregel.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein the object is at least partially immersed in the pregel.
Claim 6
Dependent Claim
56 words
A product comprising: (a) a support material; and (b) an aerogel adhering, in the absence of a bonding medium, to at least a portion of the support material, the bulk density of the adhering aerogel being substantially the same in the final form of the product as the bulk density of the aerogel upon formation thereof.
Claim 7
Dependent Claim
56 words
A product comprising: (a) a support material; and (b) an aerogel adhering, in the absence of a bonding medium, to at least a portion of the support material, the bulk density of the adhering aerogel being substantially the same in the final form of the product as the bulk density of the aerogel upon formation thereof.
Claim 8
Dependent Claim
24 words
A product as in claim 5 wherein the support material is a porous structure and the aerogel accumulates within the pores of the structure.
Claim 9
Dependent Claim
9 words
A product produced by the process of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |