US3883176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair shell
Assignee: PEL Ltd
•
Filing: 1974-01-14
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Granted: 1975-05-13
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Expires: 1994-01-14
Abstract
Abstract A one piece chair shell comprising a seat portion and a backrest portion connected by a vertically corrugated integral connecting section.
Inventors
- 👤 Philip Hugh Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:55
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
56 words
A one piece chair shell comprising a seat portion connected to a backrest portion by at least one connecting section which is vertically corrugated and which is substantially narrower than the seat portion and the backrest portion with the vertical corrugations facilitating support of the substantially narrower connecting section and the remainder of the chair shell.
Claim 2
Dependent Claim
56 words
A one piece chair shell comprising a seat portion connected to a backrest portion by at least one connecting section which is vertically corrugated and which is substantially narrower than the seat portion and the backrest portion with the vertical corrugations facilitating support of the substantially narrower connecting section and the remainder of the chair shell.
Claim 3
Dependent Claim
27 words
The invention in accordance with claim 1 wherein the connecting section is provided with side flanges and a central recess, the section being concave in side elevation.
Claim 4
Dependent Claim
34 words
The invention is accordance with claim 2 wherein the seat and backrest portions are flanged and the flanges merge with the connecting section thereby providing a continuous flange about the circumference of the shell
Claim 5
Dependent Claim
16 words
The invention in accordance with claim 1 wherein the shell is of a molded plastics material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |