US3557995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Upwardly expansible plastic vented lid
Assignee: Phillips Petroleum Co
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Filing: 1968-11-12
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Granted: 1971-01-26
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Expires: 1988-11-12
Abstract
Abstract A plastic lid is provided with an inverted U-shaped rim adapted to fit on the open ends of a plurality of containers having differently shaped ends, said lid having a vent, and an annular groove with radial-shaped groove arms permitting the lid to bulge upwardly and relieve internal pressure when the lid is forced on a container, but maintaining the top of the lid in a horizontal position when a plurality of filled and lidded containers are stacked one upon another, with the base of one container on the lid of another container.
Inventors
- 👤 Salustiana S Mirasol Jr
- 👤 George E Macewen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:45
CPC Classifications
B; B65; B65D; B65D21/00; B65D21/02; B65D21/0209; B65D21/0217; B65D21/0219; B65D43/00; B65D43/02; B65D43/0202; B65D43/0214; B65D43/0218; B65D2205/00; B65D2205/02; B65D2543/00; B65D2543/00009; B65D2543/00018; B65D2543/00064; B65D2543/00074; B65D2543/00092; B65D2543/00259; B65D2543/00296; B65D2543/00342; B65D2543/00398; B65D2543/00407; B65D2543/00416; B65D2543/00444; B65D2543/00481; B65D2543/0049; B65D2543/00509; B65D2543/00537; B65D2543/00555
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
A circular plastic lid having a flexible central portion and means around its circumference to seal it to the top of a container, comprising in combination: a downwardly extending concentric annular groove formed in said central portion intermediate the center and circumference thereof; a plurality of downwardly extending radial grooves formed in the central portion extending in communication with the annular groove and extending radially outwardly and growing shallower as they approach said circumference; and a small venthole perforating said flexible central portion.
Claim 2
Dependent Claim
83 words
A circular plastic lid having a flexible central portion and means around its circumference to seal it to the top of a container, comprising in combination: a downwardly extending concentric annular groove formed in said central portion intermediate the center and circumference thereof; a plurality of downwardly extending radial grooves formed in the central portion extending in communication with the annular groove and extending radially outwardly and growing shallower as they approach said circumference; and a small venthole perforating said flexible central portion.
Claim 3
Dependent Claim
26 words
The lid of claim 1 in which inside the annular groove there is a central depressed portion, and the venthole is located in the depressed portion.
Claim 4
Dependent Claim
28 words
The lid of claim 1 in which the means around its circumference to seal it to the top of a container is an annular concentric inverted U-shaped rim.
Claim 5
Dependent Claim
14 words
The lid of claim 1 in which there are three to 12 radial grooves.
Claim 6
Dependent Claim
12 words
The lid of claim 1 in which there are four radial grooves.
Claim 7
Dependent Claim
31 words
The lid of claim 3 in which the outer edge of the rim is formed with a downwardly extending skirt having an outwardly extending annular groove and an annular external flange.
References Cited (Backward Citations)
US3283939A
Cited
US3362575A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |