Patent US4225946A successfully refreshed from Google Patents.
US4397347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable panel or door
Assignee: Nergeco SA
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Filing: 1981-10-14
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Granted: 1983-08-09
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Expires: 2001-10-14
Abstract
Abstract There is disclosed a foldable panel made out of two superimposed web surfaces having major transparent portions, the web surfaces being secured one to each other by successive pairs of connection lines defining therebetween pockets within which are enclosed bands of reduced thickness out of an insulating material and formed with a plurality of transversing holes to permit to see through the panel. Between the pockets, the connection lines further define sheaths for receiving hinge tubes, some of which have laterally protruding ends with rollers cooperating with side guiding tracks for the panel.
Inventors
- 👤 Henri Brabant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:23
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/02; E06B9/06; E06B9/0692; E06B9/0607; E06B9/0615; E06B9/0638; E06B9/0646; E06B9/0653; E06B9/0669
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
A foldable panel for forming a vertically foldable or extendable wall or door comprising: two substantially coextensive webs which are secured to each other along pairs of parallel transversely extending connection lines defining between said pairs interconnected parallel pockets, said webs being made of a flexible sheet material having at least partially transparent vertical zones, the lines of each of said pairs defining therebetween a sheath, a rigid hinge tube within each sheath, a band of flexible insulating material within each of said pockets, said bands having zones corresponding to said transparent zones of said webs formed with holes having air trapped therein between said webs and being of sufficient size and number to provide good visibility through said panel.
Claim 2
Dependent Claim
120 words
A foldable panel for forming a vertically foldable or extendable wall or door comprising: two substantially coextensive webs which are secured to each other along pairs of parallel transversely extending connection lines defining between said pairs interconnected parallel pockets, said webs being made of a flexible sheet material having at least partially transparent vertical zones, the lines of each of said pairs defining therebetween a sheath, a rigid hinge tube within each sheath, a band of flexible insulating material within each of said pockets, said bands having zones corresponding to said transparent zones of said webs formed with holes having air trapped therein between said webs and being of sufficient size and number to provide good visibility through said panel.
Claim 3
Dependent Claim
29 words
The panel of claim 1, wherein each second said tube has opposite ends protruding from said sheath and supporting roller means adapted for cooperating with a side track means.
Claim 4
Dependent Claim
35 words
The panel of claim 2, wherein each other said tube has a reduced length and is totally trapped between said two web surfaces, said bands of insulating material being also totally trapped between said webs.
Claim 5
Dependent Claim
14 words
The panel of claim 3, wherein said webs are made of translucent polyvinyl chloride.
References Cited (Backward Citations)
US2667218A
Cited
US4083395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |