US3696845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curtain
Assignee: JACOB ACKER AND SOHNE oHG
•
Filing: 1969-11-12
•
Granted: 1972-10-10
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Expires: 1989-11-12
Abstract
Abstract A curtain made of a transparent curtain material has wavy or undulating selvage at its bottom edge and lengthwise panels. The weft threads of the fabric extend lengthwise and the density of these threads is increased in alternate panels from the lengthwise midline of the panels toward the edges of the adjacent panels and the crosswise warp threads are alternately convexly and concavely curved from panel to panel whereby the curtain while actually flat presents when hung the optical appearance of a curtain having the folds of a pleated curtain.
Inventors
- 👤 Josef Acker
- 👤 Albert Hofmann
- 👤 Georg Fruhholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:04
CPC Classifications
A; A47; A47H; A47H23/00; A47H23/02; A47H23/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
A curtain comprised of a piece of soft woven fabric including lengthwise and crosswise threads extending across the length and width respectively of said piece of woven fabric, the lengthwise threads defining a plurality of lengthwise panels, alternate ones of said panels having the same density of the lengthwise threads across the width of the respective panels and a varying density of the lengthwise threads decreasing from the lengthwise edges toward the middle of the respective panels, and having at one side a selvage including a plurality of alternately concavely and convexly curved portions to give the curtain material when hung with the curved selvage as the bottom edge the optical appearance of having the lengthwise folds of a pleated curtain.
Claim 2
Dependent Claim
121 words
A curtain comprised of a piece of soft woven fabric including lengthwise and crosswise threads extending across the length and width respectively of said piece of woven fabric, the lengthwise threads defining a plurality of lengthwise panels, alternate ones of said panels having the same density of the lengthwise threads across the width of the respective panels and a varying density of the lengthwise threads decreasing from the lengthwise edges toward the middle of the respective panels, and having at one side a selvage including a plurality of alternately concavely and convexly curved portions to give the curtain material when hung with the curved selvage as the bottom edge the optical appearance of having the lengthwise folds of a pleated curtain.
Claim 3
Dependent Claim
14 words
The curtain according to claim 1 wherein said crosswise threads include curved thread portions.
Claim 4
Dependent Claim
19 words
The curtain according to claim 1 wherein said crosswise threads extending across the panels include straight and curved portions.
Claim 5
Dependent Claim
20 words
The curtain according to claim 1 wherein said crosswise threads extending across said panels are alternately concavely and convexly curved.
Claim 6
Dependent Claim
52 words
The curtain according to claim 4 wherein the crosswise threads are convexly curved with reference to the bottom edge portion of panels woven with a varying density of the lengthwise threads and concavely curved with reference to the bottom edge portion of panels woven with a uniform density of the lengthwise threads.
Claim 7
Dependent Claim
23 words
The curtain according to claim 1 wherein said crosswise threads extend across the panels at different levels with reference to the bottom edge.
Claim 8
Dependent Claim
20 words
The curtain according to claim 6 wherein the curved bottom edge portions are set off with reference to one another.
Claim 9
Dependent Claim
38 words
The curtain according to claim 1 wherein said panels having the same density of the threads are of equal width but of a width different from the width of the panels having the varying density of the threads.
References Cited (Backward Citations)
US1686630A
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US764208A
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US914362A
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US1817716A
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US2065309A
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US2079831A
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US2093187A
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US2125422A
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US2998829A
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US3259151A
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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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |