Patent US3858748A successfully refreshed from Google Patents.
US3858748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container and lid construction for indicating lid removal
Assignee: Dart Container Corp
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Filing: 1973-08-24
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Granted: 1975-01-07
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Expires: 1993-08-24
Abstract
Abstract A plastic container and cover assembly which is opened with mutilation or severing of an outer top peripheral portion of the container, and reclosed with the original cover for reuse; the peripheral portion of the cover is of inverted U-shape providing an inner flange for frictional or snap interlocking with the container body wall and an outer dependent flange extending into an upwardly open groove or trough on the container, the horizontal flange portion of the cover overlying an outward radial rim portion on the container which rim portion is peripherally weakened continuously or at intervals to be severed therealong upon removal of the container grooved portion and cover with discarding of the severed grooved portion and permissive reuse of the cover to close the container, and with the weakened portion severed along at least a substantial portion thereof following any attempt to pry the cover from the container grooved portion, thus indicating a mutilation of that portion of the container as a tell-tale.
Inventors
- 👤 Leslie Stephan Marco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:40
CPC Classifications
B; B65; B65D; B65D43/00; B65D43/02; B65D43/0202; B65D43/0214; B65D43/0218; B65D43/022; B65D2401/00; B65D2401/10; B65D2543/00; B65D2543/00009; B65D2543/00018; B65D2543/00064; B65D2543/00074; B65D2543/00092; B65D2543/00259; B65D2543/00296; B65D2543/00444; B65D2543/00453; B65D2543/00472; B65D2543/00481; B65D2543/0049; B65D2543/00509; B65D2543/00537; B65D2543/00546
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
206 words
A plastic container assembly comprising a body portion having an open end defined by a generally vertical inner wall and an outer depending generally vertical wall joined to the inner wall by a top wall portion, and with the lower portion of the depending outer wall terminating in an upwardly facing trough formation, and a cover closing the open end of the body portion and having radially spaced inner and outer walls interconnected by a top cover flange, said inner walls of said container and said cover being formed to cooperate in a manually releasable interlocking fit, said outer depending wall of the cover projecting into the upwardly facing trough formation, said outer depending wall of the cover and the outer upwardly extending segment of said upwardly facing trough formation being relatively formed to substantially prevent access by a person''s finger to the lower edge of said outer depending wall of the cover, and means for weakening said top wall portion of the body portion around the periphery thereof for complete severance therealong upon authorized removal of the cover and trough formation from the body portion and discarding of the trough formation permitting the original cover to be used as a reclosure for the body portion.
Claim 2
Dependent Claim
206 words
A plastic container assembly comprising a body portion having an open end defined by a generally vertical inner wall and an outer depending generally vertical wall joined to the inner wall by a top wall portion, and with the lower portion of the depending outer wall terminating in an upwardly facing trough formation, and a cover closing the open end of the body portion and having radially spaced inner and outer walls interconnected by a top cover flange, said inner walls of said container and said cover being formed to cooperate in a manually releasable interlocking fit, said outer depending wall of the cover projecting into the upwardly facing trough formation, said outer depending wall of the cover and the outer upwardly extending segment of said upwardly facing trough formation being relatively formed to substantially prevent access by a person''s finger to the lower edge of said outer depending wall of the cover, and means for weakening said top wall portion of the body portion around the periphery thereof for complete severance therealong upon authorized removal of the cover and trough formation from the body portion and discarding of the trough formation permitting the original cover to be used as a reclosure for the body portion.
Claim 3
Dependent Claim
33 words
A container assembly as claimed in claim 1, wherein the top wall portion of the body portion is provided with groove means extending at least partially therethrough to provide the peripheral weakening means.
Claim 4
Dependent Claim
21 words
A container assembly as claimed in claim 2, wherein the groove means is interrupted at spaced intervals around the periphery thereof.
Claim 5
Dependent Claim
32 words
A container assembly as claimed in claim 1, wherein the top wall portion of the body portion is provided with groove means extending completely therethrough at spaced intervals around the periphery thereof.
Claim 6
Dependent Claim
57 words
A container assembly as claimed in claim 1, wherein the top wall portion of the body portion is of sufficient radial extent to radially space the inner and outer walls of the body portion and provide an inverted U-shaped configuration fitting within the inverted U-shaped configuration provided by the inner and outer walls and the cover flange.
Claim 7
Dependent Claim
33 words
A container assembly as claimed in claim 5, wherein the top wall portion of the body portion is provided with groove meanS extending at least partially therethrough to provide the peripheral weakening means.
Claim 8
Dependent Claim
26 words
A container assembly as claimed in claim 6, wherein the groove means extends from the under face of the top wall portion of the body portion.
Claim 9
Dependent Claim
34 words
A container assembly as claimed in claim 7, wherein there is provided additional groove means extending from the upper face of the top wall portion toward the groove means in the under face thereof.
Claim 10
Dependent Claim
44 words
A container assembly as claimed in claim 1, wherein the inner and outer walls of the body portion are radially spaced apart and the top wall portion is provided with groove means extending from the upper face thereof to provide the peripheral weakening means.
Claim 11
Dependent Claim
26 words
A container assembly as claimed in claim 1, wherein there is relatively loose interfitting between the outer cover wall and the trough formation to facilitate separation.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |