US5122412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene plexifilamentary film-fibril sheet
Assignee: EIDP Inc
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Filing: 1991-09-30
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Granted: 1992-06-16
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Expires: 2011-09-30
Abstract
Abstract A metallized high specular gloss polyethylene plexifilamentary film-fibril sheet with very low emissivity is made by a process 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 01:18
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/02; C23C14/028; B; B29; B29C; B29C59/00; B29C59/02; B29C59/04; C23C14/06; C23C14/14; C23C14/20; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H3/00; D04H3/08; D04H3/16; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249987; Y10T428/249988; Y10T428/249989; Y10T428/31; Y10T442/00; Y10T442/60; Y10T442/654
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A high gloss polyethylene plexifilamentary film-fibril sheet having a specular gloss on at least one side of at least 28 percent, 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
51 words
A high gloss polyethylene plexifilamentary film-fibril sheet having a specular gloss on at least one side of at least 28 percent, 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.
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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) | 1995-06-16 | 1995-12-16 | 1996-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-16 | 1999-12-16 | 2000-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-16 | 2003-12-16 | 2004-06-16 | $7700.00 | Window Closed / Lapsed |