US3786954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure cap liner
Assignee: Anchor Hocking LLC
•
Filing: 1971-10-18
•
Granted: 1974-01-22
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Expires: 1991-10-18
Abstract
Abstract An improved cap liner is disclosed for use with a closure cap in sealing a container. The liner is cut from a foamed polyethylene sheet material. It provides an extremely tight seal for products such as fine powdered products where leakage has been experienced with prior liners. The foamed liner material has improved dynamic cushioning properties so that a tight seal is maintained at all times including handling and shipping operations of the sealed package. One embodiment of the closure is a laminate of the foamed sheet material and a thin air impervious film such as a saran resin film.
Inventors
- 👤 R Shull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:21
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/04; B65D41/0435; B65D41/045; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
The gasket as claimed in claim 1 in which said polyethylene has a relatively high density.
Claim 2
Dependent Claim
18 words
The gasket as claimed in claim 2 in which said density is about 6 pounds per cubic feet.
Claim 3
Dependent Claim
24 words
The gasket as claimed in claim 2 in which said polyethylene has a Bashore percent rebound of about 42 providing dynamic liner cushioning properties.
Claim 4
Dependent Claim
27 words
The gasket as claimed in claim 1 in which said cellular layer is about 0.1 inch in thickness and said thin layer is about 0.0002 inches thick.
References Cited (Backward Citations)
US2389761A
Cited
US3202307A
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US3031332A
Cited
US3213071A
Cited
US3202308A
Cited
US3323672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |