US4136222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally insulating sheet material
Assignee: 3M Co
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Filing: 1977-04-18
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Granted: 1979-01-23
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Expires: 1997-04-18
Abstract
Abstract A new thermally insulating sheet material in which a thin drapeable specularly reflective sheet is supported in spaced relation from a thermally radiating surface by an array of resiliently flexible and compressible polymeric foam segments that cover only a portion of the area of the sheet.
Inventors
- 👤 Nelson Jonnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:28
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; A; A41; A41D; A41D31/00; A41D31/04; A41D31/06; A41D31/065; B29; B29D; B29D24/00; B29D24/002; B29D24/005; B32B5/00; B32B5/18; B32B38/00; B32B2038/0052; B32B2038/0088; B32B2307/00; B32B2307/30; B32B2307/304; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2437/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24174; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24628; Y10T428/24661; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/26; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
151 words
A sheet material useful as thermal insulation in garments and the like comprising (1) at least one thin lightweight drapeable sheet carrying a vapor-deposited layer of specularly reflective material on at least one surface; and (2) at least one separator layer between about one-fourth and one-and-one-half centimeters thick adhered to said sheet and comprising an open array of resiliently flexible supple and compressible polymeric foam segments having a density less than about 0.5 gram/cubic centimeter, said array of segments covering between about 10 and 60 percent of the area of said sheet and having a maximum span across an open area of the array of no more than about 5 centimeters, and said separator layer exhibiting a reduction in thickness of no more than about 50 percent under a static load of 7 grams/square centimeter and a regain after brief compression at 70 grams/square centimeter of at least about 90 percent.
Claim 2
Dependent Claim
151 words
A sheet material useful as thermal insulation in garments and the like comprising (1) at least one thin lightweight drapeable sheet carrying a vapor-deposited layer of specularly reflective material on at least one surface; and (2) at least one separator layer between about one-fourth and one-and-one-half centimeters thick adhered to said sheet and comprising an open array of resiliently flexible supple and compressible polymeric foam segments having a density less than about 0.5 gram/cubic centimeter, said array of segments covering between about 10 and 60 percent of the area of said sheet and having a maximum span across an open area of the array of no more than about 5 centimeters, and said separator layer exhibiting a reduction in thickness of no more than about 50 percent under a static load of 7 grams/square centimeter and a regain after brief compression at 70 grams/square centimeter of at least about 90 percent.
Claim 3
Dependent Claim
33 words
Sheet material of claim 1 in which said sheet has a porosity of at least about 1 cubic centimeter per square centimeter per second under a pressure of one gram per square centimeter.
Claim 4
Dependent Claim
19 words
Sheet material of claim 1 in which said separator layer is between about one-half and one centimeter in thickness.
Claim 5
Dependent Claim
35 words
Sheet material of claim 1 which includes a second thin drapeable lightweight sheet carrying a vapor-deposited layer of specular reflective material and attached to the side of said separator layer opposite from the first sheet.
Claim 6
Dependent Claim
25 words
Sheet material of claim 1 in which said array of segments comprises a sheet of said polymeric foam cut and expanded to an open network.
Claim 7
Dependent Claim
23 words
Sheet material of claim 1 in which said separator layer covers between about 10 and 30 percent of the area of said sheet.
Claim 8
Dependent Claim
21 words
Sheet material of claim 1 in which the average width of a foam segment is no more than about 5 millimeters.
Claim 9
Dependent Claim
20 words
Sheet material of claim 1 in which a separator layer as described is adhered to each side of said sheet.
Claim 10
Dependent Claim
20 words
Sheet material of claim 8 in which each side of said sheet carries a vapor-deposited layer of specularly reflective material.
Claim 11
Dependent Claim
163 words
A sheet material useful as thermal insulation in garments and the like comprising (1) at least one thin lightweight drapeable sheet carrying a vapor-deposited layer of specularly reflective material on at least one surface; and (2) at least one separator layer between about one-half and one centimeter thick adhered to a side of said sheet and comprising an open array of resiliently flexible supple and compressible polymeric foam segments having a density less than about 0.5 gram/cubic centimeter and averaging less than about 5 millimeters in width, said array of segments covering between about 10 and 30 percent of the area of said sheet and having a maximum span across an open area of the array of no more than about 3 centimeters, and said separator layer exhibiting a reduction in thickness of no more than about 50 percent under a static load of 7 gram/square centimeter and a regain after brief compression at 70 grams/square centimeter of at least about 90 percent.
Claim 12
Dependent Claim
163 words
A sheet material useful as thermal insulation in garments and the like comprising (1) at least one thin lightweight drapeable sheet carrying a vapor-deposited layer of specularly reflective material on at least one surface; and (2) at least one separator layer between about one-half and one centimeter thick adhered to a side of said sheet and comprising an open array of resiliently flexible supple and compressible polymeric foam segments having a density less than about 0.5 gram/cubic centimeter and averaging less than about 5 millimeters in width, said array of segments covering between about 10 and 30 percent of the area of said sheet and having a maximum span across an open area of the array of no more than about 3 centimeters, and said separator layer exhibiting a reduction in thickness of no more than about 50 percent under a static load of 7 gram/square centimeter and a regain after brief compression at 70 grams/square centimeter of at least about 90 percent.
Claim 13
Dependent Claim
33 words
Sheet material of claim 10 in which said sheet has a porosity of at least about 10 cubic centimeter per square centimeter per second under a pressure of one gram per square centimeter.
Claim 14
Dependent Claim
25 words
Sheet material of claim 10 in which said array of segments comprises a sheet of said polymeric foam cut and expanded to an open network.
Claim 15
Dependent Claim
20 words
Sheet material of claim 10 in which a separator layer as described is adhered to each side of said sheet.
Claim 16
Dependent Claim
20 words
Sheet material of claim 13 in which each side of said sheet carries a vapor-deposited layer of specularly reflective material.
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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |