US5032439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal insulations using vacuum panels
Assignee: Massachusetts Institute of Technology
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Filing: 1989-08-25
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Granted: 1991-07-16
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Expires: 2009-08-25
Abstract
Abstract Thermal insulation vacuum panels are formed of an inner core of compressed low thermal conductivity powders enclosed by a ceramic/glass envelope evaluated to a low pressure.
Inventors
- 👤 Leon R. Glicksman
- 👤 Melissa S. Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:11
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/06; F25D23/062; F25D23/063; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; E04B1/803; F25D2201/00; F25D2201/10; F25D2201/14; Y; Y02; Y02A; Y02A30/00; Y02A30/24; Y02A30/242; Y02B; Y02B80/00; Y02B80/10; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/23; Y10T428/231; Y10T428/234; Y10T428/239; Y10T428/249921; Y10T428/249953; Y10T428/249987
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
54 words
An evacuated insulation system comprising: a) a plurality of panels each comprising: (i) an inner core of low thermal conductivity powder; (ii) an outer envelope of thin low thermal conductivity, low gas permeable glass material enclosing the powder in an evacuated volume; and b) a protective covering of closed cell foam enclosing the panels.
Claim 2
Dependent Claim
54 words
An evacuated insulation system comprising: a) a plurality of panels each comprising: (i) an inner core of low thermal conductivity powder; (ii) an outer envelope of thin low thermal conductivity, low gas permeable glass material enclosing the powder in an evacuated volume; and b) a protective covering of closed cell foam enclosing the panels.
Claim 3
Dependent Claim
20 words
The system of claim 3 wherein the panels form an array of N rows and M columns of evacuated panels.
Claim 4
Dependent Claim
13 words
The system of claim 2 wherein N and M are greater than one.
Claim 5
Dependent Claim
54 words
An evacuated insulation system comprising: a) a plurality of panels each comprising: (i) an inner core of low thermal conductivity powder; (ii) an outer envelope of thin low thermal conductivity, low gas permeable ceramic material enclosing the powder in an evacuated volume; and b) a protective covering of closed cell foam enclosing the panels.
Claim 6
Dependent Claim
54 words
An evacuated insulation system comprising: a) a plurality of panels each comprising: (i) an inner core of low thermal conductivity powder; (ii) an outer envelope of thin low thermal conductivity, low gas permeable ceramic material enclosing the powder in an evacuated volume; and b) a protective covering of closed cell foam enclosing the panels.
Claim 7
Dependent Claim
20 words
The system of claim 4 wherein the panels form an array of N rows and M columns of evacuated panels.
Claim 8
Dependent Claim
13 words
The system of claim 5 wherein N and M are greater than one.
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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) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |