Patent US4416552A successfully refreshed from Google Patents.
US3662932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pack convertible to stool
Assignee: Individual
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Filing: 1970-06-01
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Granted: 1972-05-16
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Expires: 1990-06-01
Abstract
Abstract A back-carried pack convertible into a four-legged stool includes a nonrigid sack element supported by a rigid frame. A cushioned surface is disposed on one side of the pack unit. Stool leg members are detachably mounted on opposed sides of the pack unit and are secured by fastening elements that also serve to secure the legs to the frame when the legs are in an extended position.
Inventors
- 👤 Ralph C Kerschner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:47
CPC Classifications
A; A45; A45F; A45F4/00; A45F4/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
A back pack convertible to a stool comprising, a pack unit forming a hollow, rigid, generally rectangular enclosure having a front surface and a rear surface and two opposed side surfaces; a plurality of leg members; fastening elements disposed in aligned pairs on each opposed side surface of the pack unit; and each leg member including means for alternately engaging a first aligned pair of the fastening elements when a leg is disposed parallel to a first edge of a side surface and a second pair of the fastening elements when the leg is disposed parallel to an edge of the side surface which is substantially orthogonal to the first edge.
Claim 2
Dependent Claim
111 words
A back pack convertible to a stool comprising, a pack unit forming a hollow, rigid, generally rectangular enclosure having a front surface and a rear surface and two opposed side surfaces; a plurality of leg members; fastening elements disposed in aligned pairs on each opposed side surface of the pack unit; and each leg member including means for alternately engaging a first aligned pair of the fastening elements when a leg is disposed parallel to a first edge of a side surface and a second pair of the fastening elements when the leg is disposed parallel to an edge of the side surface which is substantially orthogonal to the first edge.
Claim 3
Dependent Claim
15 words
A back pack according to claim 1 wherein the rear surface constitutes a seating surface.
Claim 4
Dependent Claim
39 words
A back pack according to claim 2 wherein the seat surface comprises a first substantially rigid layer, an intermediate layer of cushioning material disposed on the rigid layer, and an outer sheet of flexible material covering the intermediate layer.
Claim 5
Dependent Claim
23 words
A back pack according to claim 3 wherein at least one slinging strap is affixed to the pack unit adjacent the seating surface.
Claim 6
Dependent Claim
28 words
A back pack according to claim 1 wherein the means for engaging the pairs of fastening elements are a plurality oF spaced slots disposed on each leg member.
Claim 7
Dependent Claim
14 words
A back pack according to claim 5 wherein each leg member includes three slots.
Claim 8
Dependent Claim
26 words
A back pack according to claim 1 wherein the first and second pairs of fastening elements have at least one fastening element common to both pairs.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |