US4139043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window shade slat
Assignee: JOANNA WESTERN CONSUMER PRODUCTS Inc
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Filing: 1977-03-10
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Granted: 1979-02-13
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Expires: 1997-03-10
Abstract
Abstract A window shade in combination with a slat made easily adjustable in length by the inclusion of regularly spaced transverse lines of weakness in the ends thereof. The window shade slat preferably consists of a flattened, convolutely or spirally wound, thickwalled, small diameter paper tube.
Inventors
- 👤 John D. Donofrio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:28
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/02; E06B9/08; E06B9/11; E06B9/17; E06B9/17046; E06B9/24; E06B9/40; E06B9/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
An improved window shade of the type having in combination a sheet of shade material with a hem pocket along the lower edge adapted for receiving therein a shade slat and a shade slat inserted within said hem pocket, wherein the improvement comprising a window shade slat which comprises a permanently flattened thick-walled, multi-layered, convolutely or spirally wound paper tube having substantial resistance to bending distortion in the direction of its greatest flattened thickness.
Claim 2
Dependent Claim
74 words
An improved window shade of the type having in combination a sheet of shade material with a hem pocket along the lower edge adapted for receiving therein a shade slat and a shade slat inserted within said hem pocket, wherein the improvement comprising a window shade slat which comprises a permanently flattened thick-walled, multi-layered, convolutely or spirally wound paper tube having substantial resistance to bending distortion in the direction of its greatest flattened thickness.
Claim 3
Dependent Claim
38 words
The window shade slat as recited in claim 1 having one end including spaced transverse lines of weakness, whereby said window shade slat may be selectively shortened by separating said slat along one of said lines of weakness.
Claim 4
Dependent Claim
19 words
The window shade slat as recited in claim 2 wherein said lines of weakness are spaced at regular intervals.
Claim 5
Dependent Claim
25 words
The window shade slat as recited in claim 2 wherein said lines of weakness include regularly spaced cuts in the surface of said flattened tube.
Claim 6
Dependent Claim
26 words
The window shade slat as recited in claim 2 wherein said lines of weakness include regularly spaced depressions pressed into the surface of said flattened tube.
References Cited (Backward Citations)
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Cited
US2483560A
Cited
US3086586A
Cited
US3485147A
Cited
US3933401A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |