US3772129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laths for roller shutters
Assignee: DOVER SHUTTERS Ltd
•
Filing: 1971-02-08
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Granted: 1973-11-13
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Expires: 1991-02-08
Abstract
Abstract A lath for a roller shutter, in which a longitudinal extruded aluminium base member is provided against one major face of which is located a layer of foamed plastic insulating material. The other side of the base member is preferably coated with an insulating layer consisting of a microcellular elastomeric material.
Inventors
- 👤 D Dover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:13
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/046; B60; B60J; B60J5/00; B60J5/04; B60J5/06; B60J5/08; B32B15/20; B32B3/00; B32B3/26; B32B3/30; B32B5/00; B32B5/18; E; E06; E06B; E06B3/00; E06B3/32; E06B3/48; E06B3/485; E06B9/00; E06B9/02; E06B9/08; E06B9/11; E06B9/15; F; F25; F25D; F25D23/00; F25D23/02; F25D23/021; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2311/00; B32B2311/24; E06B2009/1505; E06B2009/1511; E06B2009/1522; E06B2009/1533; E06B2009/1538; E06B2009/155; E06B2009/1566; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A lath for a roller shutter comprising a box section having a front wall, a rear wall, upPer and lower walls extending between said front and rear walls, said upper and lower walls each having an inclined face extending from the front to the rear of the lath, and an intermediate rib extending from the front wall and connected to the rear wall, the interior of the box section being filled with low density polyurethane foam having a density of between 1.5 and 4 pounds per cubic foot, the rear wall having a layer of semi-flexible closed microcellular polyurethane elastomer having a K value of not more than 0.45 on the outer face thereof.
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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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |