US3989142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stackable container lid
Assignee: THERMOFORMED PRODUCTS Inc A CORP OF UT
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Filing: 1975-10-15
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Granted: 1976-11-02
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Expires: 1995-10-15
Abstract
Abstract A stackable container lid for a bucket containing hot foods and the like comprising a generally circular lid having center portion surrounded by a series of polyhedrons, one plane of which extends upwardly at right angles from the lid surface thereby forming a perimeter into which the bottom of the bucket can be inserted. The lid may also contain vent holes in a rim on the outer perimeter of the container lid. The rim terminates in a downwardly extending lip adapted to snap over the top of the bucket in a sealing relationship.
Inventors
- 👤 James L. Gwilliam, Jr.
- 👤 Warde Mitchell Cameron, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:19
CPC Classifications
B; B65; B65D; B65D21/00; B65D21/02; B65D21/0209; B65D21/0217; B65D21/0219; B65D43/00; B65D43/02; B65D43/0202; B65D43/0204; B65D43/0212; B65D51/00; B65D51/16; B65D51/1605; B65D51/1622; B65D51/1627; B65D2543/00; B65D2543/00009; B65D2543/00018; B65D2543/00064; B65D2543/00074; B65D2543/00092; B65D2543/00259; B65D2543/00296; B65D2543/00342; B65D2543/00398; B65D2543/00444; B65D2543/00481; B65D2543/0049; B65D2543/00509; B65D2543/00537; B65D2543/00555; B65D2543/00592; B65D2543/00712; B65D2543/00722; B65D2543/00731; B65D2543/00787; B65D2543/00796
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
190 words
A semiflexible container lid comprising a generally circular lid having a circular center portion surrounded by a continuous series of polyhedrons, each consisting of an upwardly projecting arcuate triangular inner surface and an inwardly projecting inclined triangular upper surface, the points of juncture of said triangular surfaces forming an apex, the sidewalls of each polyhedron sloping outwardly and away from the edges of the triangular surfaces depending from the apex to form an irregular rectangle, each sidewall adjoining the sidewall of an adjacent polyhedron at the bottom edge thereof to form a valley which valley extends from the perimeter of the circular center portion to a backwall portion defined by the space between the sloping adjoining sidewalls, said backwall portion being contiguous with the back edges of said sloping sidewalls, the back edge of said upper triangular surface and the top edge of said backwall portion being bounded on the outside by a contiguous border adapted to rest on the rim of a container, said border terminating in a downwardly and inwardly extending lip which is sufficiently flexible to expand over the rim of a container in a sealing relationship.
Claim 2
Dependent Claim
190 words
A semiflexible container lid comprising a generally circular lid having a circular center portion surrounded by a continuous series of polyhedrons, each consisting of an upwardly projecting arcuate triangular inner surface and an inwardly projecting inclined triangular upper surface, the points of juncture of said triangular surfaces forming an apex, the sidewalls of each polyhedron sloping outwardly and away from the edges of the triangular surfaces depending from the apex to form an irregular rectangle, each sidewall adjoining the sidewall of an adjacent polyhedron at the bottom edge thereof to form a valley which valley extends from the perimeter of the circular center portion to a backwall portion defined by the space between the sloping adjoining sidewalls, said backwall portion being contiguous with the back edges of said sloping sidewalls, the back edge of said upper triangular surface and the top edge of said backwall portion being bounded on the outside by a contiguous border adapted to rest on the rim of a container, said border terminating in a downwardly and inwardly extending lip which is sufficiently flexible to expand over the rim of a container in a sealing relationship.
Claim 3
Dependent Claim
28 words
A container lid as claimed in claim 1 wherein the polyhedrons are adapted to press inwardly when pressure is placed on the circular center portion of the lid.
Claim 4
Dependent Claim
22 words
A container lid as claimed in claim 2 wherein the border adapted to rest on the rim of a container contains vents.
Claim 5
Dependent Claim
21 words
A container lid as claimed in claim 3 wherein the downwardly extending lip contains handle means extending therefrom at right angles.
Claim 6
Dependent Claim
16 words
A container lid as claimed in claim 4 wherein the circular center portion is slightly convex.
Claim 7
Dependent Claim
244 words
A container and lid combination comprising a. a container having a rim at the top and having a closed bottom, the circumference of the container being greater at the top than at the base, and b. a lid adapted to fit on to the base of said container or to fit over the top of said container in a sealing relationship, said lid containing a circular center portion surrounded by a continuous series of polyhedrons, each consisting of an upwardly projecting arcuate triangular inner surface and an inwardly projecting inclined triangular upper surface, the points of juncture of said triangular surfaces forming an apex, the sidewalls of each polyhedron sloping outwardly and away from the edges of the triangular surfaces depending from the apex to form an irregular rectangle, each sidewall adjoining the sidewall of an adjacent polyhedron at the bottom edge thereof to form a valley, which valley extends from the perimeter of the circular center portion to a backwall portion defined by the space between the sloping adjoining sidewalls, said backwall portion being contiguous with the back edges of said sloping sidewalls, the back edge of said upper triangular surface and the top edge of said backwall portion being bounded on the outside by a contiguous border adapted to rest on the rim of the container, said border terminating in a downwardly and inwardly extending lip which is sufficiently flexible to expand over the rim of the container in a sealing relationship.
Claim 8
Dependent Claim
244 words
A container and lid combination comprising a. a container having a rim at the top and having a closed bottom, the circumference of the container being greater at the top than at the base, and b. a lid adapted to fit on to the base of said container or to fit over the top of said container in a sealing relationship, said lid containing a circular center portion surrounded by a continuous series of polyhedrons, each consisting of an upwardly projecting arcuate triangular inner surface and an inwardly projecting inclined triangular upper surface, the points of juncture of said triangular surfaces forming an apex, the sidewalls of each polyhedron sloping outwardly and away from the edges of the triangular surfaces depending from the apex to form an irregular rectangle, each sidewall adjoining the sidewall of an adjacent polyhedron at the bottom edge thereof to form a valley, which valley extends from the perimeter of the circular center portion to a backwall portion defined by the space between the sloping adjoining sidewalls, said backwall portion being contiguous with the back edges of said sloping sidewalls, the back edge of said upper triangular surface and the top edge of said backwall portion being bounded on the outside by a contiguous border adapted to rest on the rim of the container, said border terminating in a downwardly and inwardly extending lip which is sufficiently flexible to expand over the rim of the container in a sealing relationship.
Claim 9
Dependent Claim
27 words
A container and lid as claimed in claim 6 wherein the periphery of the circular center portion is the same as the circumference of the container base.
Claim 10
Dependent Claim
39 words
A container and lid as claimed in claim 7 wherein the polyhedrons in the lid are adapted to press inwardly when pressure exerted by the base of the container is placed on the circular center portion of the lid.
Claim 11
Dependent Claim
20 words
A container and lid as claimed in claim 8 wherein the circular center portion of the lid is slightly convex.
Claim 12
Dependent Claim
26 words
A container and lid as claimed in claim 9 wherein the border in the lid adapted to rest on the rim of the container contains vents.
References Cited (Backward Citations)
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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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |