Patent US4579756A successfully refreshed from Google Patents.
US4579756A
Expired / Lapsed
US
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Insulation material with vacuum compartments
Assignee: Individual
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Filing: 1984-08-13
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Granted: 1986-04-01
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Expires: 2004-08-13
Abstract
Abstract An insulating sheet material is made of a plurality of air tight chambers, each having a partial vacuum therein, held together in closely spaced side-by-side relationship so as to form a sheet of such compartments. The insulating sheet may be formed of sheets of material bonded together so as to form the side-by-side compartments, or the compartments may be individually formed and secured in side-by-side relationship by a film of material to which the compartments are adhered. The insulation sheet is preferrably perforated between compartments so that the sheet can be easily torn to any desired size.
Inventors
- 👤 Rex D. Edgel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:27
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; B32B27/00; B32B27/06; B32B27/08; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; E04B1/803; B32B2307/00; B32B2307/30; B32B2307/304; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2419/00; Y; Y02; Y02A; Y02A30/00; Y02A30/24; Y02A30/242; Y02B; Y02B80/00; Y02B80/10; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/15; Y10T428/23; Y10T428/231; Y10T428/239; Y10T428/24; Y10T428/24628; Y10T428/24661; Y10T428/24669; Y10T428/24694
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
Transparent insulating material comprising two rigid sheets of transparent material, spacer means about the periphery of the sheets of rigid material to hold them in spaced relationship; and transparent air impervious flexible material sealed about the rigid sheets of transparent material and spacers to form an air tight chamber between the rigid sheets; and a partial vacuum within the chamber.
Claim 2
Dependent Claim
60 words
Transparent insulating material comprising two rigid sheets of transparent material, spacer means about the periphery of the sheets of rigid material to hold them in spaced relationship; and transparent air impervious flexible material sealed about the rigid sheets of transparent material and spacers to form an air tight chamber between the rigid sheets; and a partial vacuum within the chamber.
References Cited (Backward Citations)
US2939811A
Cited
US3630346A
Cited
NL7503673A
Cited
US4167598A
Cited
US4204015A
Cited
US4304824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |