US4957211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-indicating closure
Assignee: Poly Seal Corp
•
Filing: 1989-07-11
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Granted: 1990-09-18
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Expires: 2009-07-11
Abstract
Abstract A vacuum-indicating closure includes a top wall 12 and a skirt 14 depending from the periphery of the skirt with a tamper-evident band 24 formed on the lower edge of the skirt. The top wall has a center deflectable portion 30 formed by a thinned circumferential hinge 32 and the deflectable portion is divided into pie-shaped segments 44 by a plurality of radially-extending thinned hinged 40. The center deflectable portion is moved between a convex position and a concave position with the presence or absence of vacuum within the container to which it is applied.
Inventors
- 👤 Len Ekkert
- 👤 Charles A. Webster
- 👤 Paul R. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:04
CPC Classifications
B; B65; B65D; B65D79/00; B65D79/005; B65D79/0087
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
105 words
A vacuum-indicating closure comprising a top wall adapted to extend across and provide a seal for neck finish of a container and a skirt extending downwardly from a periphery of said top wall and having a member for securing said closure, the improvement comprising means defining a deflectable center portion in said top wall, said deflectable center portion having radially-extending thinned portions to divide said center portion into segments joined to each other by said thinned portions so that said center portion moves between a generally outward convex configuration to a generally concave configuration depending upon the presence or absence of vacuum in the container.
Claim 2
Dependent Claim
105 words
A vacuum-indicating closure comprising a top wall adapted to extend across and provide a seal for neck finish of a container and a skirt extending downwardly from a periphery of said top wall and having a member for securing said closure, the improvement comprising means defining a deflectable center portion in said top wall, said deflectable center portion having radially-extending thinned portions to divide said center portion into segments joined to each other by said thinned portions so that said center portion moves between a generally outward convex configuration to a generally concave configuration depending upon the presence or absence of vacuum in the container.
Claim 3
Dependent Claim
25 words
A closure as defined in claim 1, in which said means includes a circumferential thinned portion spaced inwardly of the periphery of said top wall.
Claim 4
Dependent Claim
20 words
A closure as defined in claim 1, and further including tamper-indicating means attached to a lower edge of said skirt.
Claim 5
Dependent Claim
20 words
A closure as defined in claim 1, further including a liner applied to the inner surface of said top wall.
Claim 6
Dependent Claim
22 words
A closure as defined in claim 4, in which said liner is secured to said inner surface along the peripheral portion thereof.
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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) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |