Patent US4471880A successfully refreshed from Google Patents.
US4471880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Center press outer seal bowl lid
Assignee: RUBBERMAIK Inc
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Filing: 1983-10-03
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Granted: 1984-09-18
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Expires: 2003-10-03
Abstract
Abstract A resilient plastic lid closure (10) for the upper rim (20) or a bowl (15) or the like, said lid having a downturned periphery (16) terminating in an outer rim flange (18) for snapping over the rim (20) when pressed downwardly at the medial portion (11) of the lid, thereby forming a tight seal with the outer surface of the bowl rim (20) when pressure on the medial portion (11) of the lid (10) is released.
Inventors
- 👤 William D. Taylor
- 👤 Richard D. Dilyard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:05
CPC Classifications
B; B65; B65D; B65D43/00; B65D43/02; B65D43/0202; B65D43/0204; B65D43/0212; B65D51/00; B65D51/16; B65D51/1672; B65D51/1688; B65D51/1694; B65D2543/00; B65D2543/00009; B65D2543/00018; B65D2543/00064; B65D2543/00074; B65D2543/00092; B65D2543/00259; B65D2543/00296; B65D2543/00342; B65D2543/00351; B65D2543/0037; B65D2543/00398; B65D2543/00416; B65D2543/00444; B65D2543/00481; B65D2543/0049; B65D2543/00518; B65D2543/00527; B65D2543/00537; B65D2543/00555; B65D2543/00592; B65D2543/00601; B65D2543/00611; B65D2543/00648; B65D2543/00675; B65D2543/00685; B65D2543/00712; B65D2543/00722; B65D2543/0074; B65D2543/00787; B65D2543/00796; B65D2543/00824; B65D2543/00833; B65D2543/00842
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
113 words
A resilient plastic lid adapted to form a tight seal with the outer surface of the upper rim of a container, said lid having a top wall having a downturned periphery terminating in an outer rim flange for fitting over the container rim, the inner diameter of said rim flange being slightly less than the outer diameter of said container rim, said top wall having such resiliency and beam strength that when pressed downwardly at its medial portion said rim flange will flex outwardly and snap over the container rim with an audible click, and when released will draw said rim flange radially inward to tighten its sealing engagement with the container rim.
Claim 2
Dependent Claim
113 words
A resilient plastic lid adapted to form a tight seal with the outer surface of the upper rim of a container, said lid having a top wall having a downturned periphery terminating in an outer rim flange for fitting over the container rim, the inner diameter of said rim flange being slightly less than the outer diameter of said container rim, said top wall having such resiliency and beam strength that when pressed downwardly at its medial portion said rim flange will flex outwardly and snap over the container rim with an audible click, and when released will draw said rim flange radially inward to tighten its sealing engagement with the container rim.
Claim 3
Dependent Claim
20 words
A resilient plastic lid as defined in claim 1, wherein the material of said lid is linear low density polyethylene.
Claim 4
Dependent Claim
26 words
A resilient plastic lid as defined in claim 2, wherein said lid rim flange forms an inner shoulder for engaging the top of the container rim.
Claim 5
Dependent Claim
38 words
A resilient plastic lid as defined in claim 3, wherein the inner diameter of said rim flange is about 0.050 inches to about 0.090 inches less than the outer diameter of the container rim on which it fits.
Claim 6
Dependent Claim
25 words
A resilient plastic lid as defined in claim 4, wherein said rim flange forms one side of a groove for fitting over the container rim.
Claim 7
Dependent Claim
20 words
A resilient plastic lid as defined in claim 5, wherein said outer rim flange terminates in an outwardly flared skirt.
Claim 8
Dependent Claim
25 words
A resilient plastic lid as defined in claim 1, wherein said rim flange forms an inner shoulder for engaging the top of the container rim.
Claim 9
Dependent Claim
38 words
A resilient plastic lid as defined in claim 7, wherein the inner diameter of said rim flange is about 0.050 inches to about 0.090 inches less than the outer diameter of the container rim on which it fits.
Claim 10
Dependent Claim
25 words
A resilient plastic lid as defined in claim 8, wherein said rim flange forms one side of a groove for fitting over the container rim.
Claim 11
Dependent Claim
20 words
A resilient plastic lid as defined in claim 9, wherein said outer rim flange terminates in an outwardly flared skirt.
Claim 12
Dependent Claim
38 words
A resilient plastic lid as defined in claim 1, wherein the inner diameter of said rim flange is about 0.050 inches to about 0.090 inches less than the outer diameter of the container rim on which it fits.
Claim 13
Dependent Claim
25 words
A resilient plastic lid as defined in claim 11, wherein said rim flange forms one side of a groove for fitting over the container rim.
Claim 14
Dependent Claim
20 words
A resilient plastic lid as defined in claim 12, wherein said outer rim flange terminates in an outwardly flared skirt.
Claim 15
Dependent Claim
20 words
A resilient plastic lid as defined in claim 1, wherein said outer rim flange terminates in an outwardly flared skirt.
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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) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |