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US5057351A
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Metallized polyethylene plexifilamentary film-fibril sheet
Assignee: EIDP Inc
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Filing: 1990-11-08
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Granted: 1991-10-15
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Expires: 2010-11-08
Abstract
Abstract A metallized high specular gloss polyethylene emissivity is made by a proceess of calendering a polyethylene film-fibril sheet between a smooth metal roll and a soft, resilient roll to form a sheet of high specular gloss, followed by vacuum metallization of the smooth high specular gloss surface. Such metallized sheets are useful as radiant barriers or roof liners for energy savings purposes.
Inventors
- 👤 David C. Jones
- 👤 Chi-Chang Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:51
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16; B; B29; B29C; B29C59/00; B29C59/02; B29C59/04; C; C23; C23C; C23C14/00; C23C14/02; C23C14/028; C23C14/06; C23C14/14; C23C14/20; D04H1/00; D04H1/40; D04H1/42; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24322; Y10T428/24331; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
49 words
A metallized polyethylene plexifilamentary film-fibril sheet having an emissivity on at least one side of from 0.06 to 0.18, a moisture vapor transport of at least 250 g/m 2 /24 hours, a Gurley Hill porosity of at least 30 seconds and a hydrostatic head of at least 55 inches.
Claim 2
Dependent Claim
49 words
A metallized polyethylene plexifilamentary film-fibril sheet having an emissivity on at least one side of from 0.06 to 0.18, a moisture vapor transport of at least 250 g/m 2 /24 hours, a Gurley Hill porosity of at least 30 seconds and a hydrostatic head of at least 55 inches.
Claim 3
Dependent Claim
15 words
The sheet of claim 1 wherein the sheet is metallized by vacuum deposition with aluminum.
Claim 4
Dependent Claim
18 words
The sheet of claim 2 wherein the aluminum thickness is in the range from 75 to 300 Angstroms.
References Cited (Backward Citations)
US3169899A
Cited
US3081519A
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US3227794A
Cited
US3442740A
Cited
US3532589A
Cited
US4508776A
Cited
US4974382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-14 | 1995-04-15 | 1995-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-14 | 1999-04-15 | 1999-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-14 | 2003-04-15 | 2003-10-15 | $7700.00 | Window Closed / Lapsed |