US3907111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning stackable container
Assignee: Boeing North American Inc
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Filing: 1973-06-14
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Granted: 1975-09-23
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Expires: 1993-06-14
Abstract
Abstract An open top integral container of the type used in the production of consumable products such as candy, capable of being stacked with another similar container and having self-cleaning features. The container has a substantially horizontally extending bottom interconnecting four substantially upright sides. A plurality of downwardly extending legs project from said sides. A plurality of upwardly and outwardly open recesses are formed in the outer walls of said sides for receiving the legs of a similar container in a stacked position. Each of said recesses is defined by a smoothly continuous surface consisting of substantially vertical portions smoothly merging with downwardly slanting portions.
Inventors
- 👤 Alvin W Levenhagen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:58
CPC Classifications
B; B65; B65D; B65D21/00; B65D21/02; B65D21/0209; B65D21/0215
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
81 words
An open top integral container capable of being stacked with another identical container, said container having a substantially horizontally extending bottom interconnecting four substantially upright sides, a plurality of downwardly extending legs projecting outwardly from said sides, each of said legs having a directly upwardly and outwardly open recess formed therein for receiving the leg of an identical container in a stacked position thereon, the surfaces defining each of said recesses being smoothly continuous and including no upwardly facing horizontal portions.
Claim 2
Dependent Claim
81 words
An open top integral container capable of being stacked with another identical container, said container having a substantially horizontally extending bottom interconnecting four substantially upright sides, a plurality of downwardly extending legs projecting outwardly from said sides, each of said legs having a directly upwardly and outwardly open recess formed therein for receiving the leg of an identical container in a stacked position thereon, the surfaces defining each of said recesses being smoothly continuous and including no upwardly facing horizontal portions.
Claim 3
Dependent Claim
28 words
The container of claim 1, wherein each of said recesses is defined by a continuous surface consisting of substantially vertical portions smoothly merging with outwardly downwardly slanting portions.
Claim 4
Dependent Claim
27 words
The container of claim 2, wherein said outwardly downwardly slanting surface portions are such as to make an angle of 45* or greater with a horizontal plane.
Claim 5
Dependent Claim
36 words
The container of claim 1, further including a plurality of outwardly open, upwardly closed pockets formed in said sides, each of said pockets being defined by a continuous, cornerless surface having no upwardly facing horizontal portion.
Claim 6
Dependent Claim
84 words
An open top integral container having a substantially horizontally extending bottom interconnecting four substantially upright sides, a plurality of downwardly extending legs projecting from said sides, exterior walls of said legs being formed with a first group of recesses for receiving the legs of a similar container in a stacked position and a second group of recesses providing hand grips for the manual manipulation of said container, the surfaces defining all of said recesses being smoothly continuous and including no upwardly facing horizontal portions.
Claim 7
Dependent Claim
84 words
An open top integral container having a substantially horizontally extending bottom interconnecting four substantially upright sides, a plurality of downwardly extending legs projecting from said sides, exterior walls of said legs being formed with a first group of recesses for receiving the legs of a similar container in a stacked position and a second group of recesses providing hand grips for the manual manipulation of said container, the surfaces defining all of said recesses being smoothly continuous and including no upwardly facing horizontal portions.
Claim 8
Dependent Claim
28 words
The container of claim 5 wherein said first group of recesses are upwardly and outwardly open and said second group of recesses are outwardly open and upwardly closed.
Claim 9
Dependent Claim
25 words
The container of claim 6, wherein said surfaces are cornerless and consist of flat portions and concavely arcuate portions smoothly merging with said flat portions.
Claim 10
Dependent Claim
43 words
The container of claim 5 including a third group of recesses formed in exterior walls of said sides to reduce the weight of said container, the surfaces defining said third group of recesses being smoothly continuous and including no upwardly facing horizontal portions.
Claim 11
Dependent Claim
27 words
The container in claim 1 wherein each of said recesses is disposed to be substantially fully upwardly closed by the presence of an identical container stacked thereon.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |