Patent US4794974A successfully refreshed from Google Patents.
US4794974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interior curtain wall
Assignee: Individual
•
Filing: 1987-06-25
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Granted: 1989-01-03
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Expires: 2007-06-25
Abstract
Abstract An interior curtain wall to prevent dust being transported from one area to another has an elongated flexible curtain that is supported on a plurality of interconnected headers, each header connected to the next by a flexible hinge and being supported against the ceiling by a support leg that is adjustable in length and has a spring loaded foot to maintain pressure against the header.
Inventors
- 👤 Charles E. Melino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:02
CPC Classifications
A; A47; A47H; A47H21/00; E; E04; E04G; E04G21/00; E04G21/24; E04G21/243
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
An interior curtain wall assembly disposed between a floor and a ceiling comprising a plurality of header elements having terminal ends, the ends of each header element connected to the end of an adjacent element by a flexible strap hinge and having a resilient tip thereon for engagement with said ceiling, said hinge spacing the ends of adjacent headers to allow folding of the assembly, a continuous flexible curtain fastened to each header throughout its length, and a plurality of support legs each being adjustable in length with a spring loaded foot at the lower end to maintain an upward force on each header, each leg engaging at least one header at its upper end and having a resilient foot at the lower end, said resilient tip preventing lateral displacement of the header elements on said ceiling and said resilient foot insuring positive engagement with the floor.
Claim 2
Dependent Claim
147 words
An interior curtain wall assembly disposed between a floor and a ceiling comprising a plurality of header elements having terminal ends, the ends of each header element connected to the end of an adjacent element by a flexible strap hinge and having a resilient tip thereon for engagement with said ceiling, said hinge spacing the ends of adjacent headers to allow folding of the assembly, a continuous flexible curtain fastened to each header throughout its length, and a plurality of support legs each being adjustable in length with a spring loaded foot at the lower end to maintain an upward force on each header, each leg engaging at least one header at its upper end and having a resilient foot at the lower end, said resilient tip preventing lateral displacement of the header elements on said ceiling and said resilient foot insuring positive engagement with the floor.
Claim 3
Dependent Claim
37 words
An interior curtain wall assembly as in claim 1 wherein each header has at least one aperture therein and said leg has a reduced upper end that engages in said aperture for positive locking with the header.
Claim 4
Dependent Claim
29 words
An interior curtain wall assembly as in claim 1 wherein the flexible curtain has hemmed pockets at its upper edge and said header elements are received in the pockets.
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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) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |