US3557989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permeable closure liner
Assignee: Scott Plastics Corp
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Filing: 1969-05-19
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Granted: 1971-01-26
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Expires: 1989-05-19
Abstract
Abstract Vapor permeable films for packaging having low, medium or high controlled breathing rates for gasses and vapors are prepared by blending latex emulsions having minimum film formation temperatures no less than about 50* C. with latex emulsions having minimum formation temperatures no greater than about 25* C. in polymer component ratios selected for controlling the degree of breathing or porosity to within a predetermined range, and coating the mixture on a fibrous sheet material with subsequent drying at room temperature or accelerated drying at elevated temperatures.
Inventors
- 👤 Edward C Balda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:20
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/16; B65D51/1605; B65D51/1622; B65D41/00; B65D41/02; B65D41/04; B65D41/0435; B65D41/045; B65D51/1616
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
31 words
The container closure liner as defined by claim 1 in combination with a closure cap, wherein the closure liner is positioned in the cap to cover the mouth of a container.
References Cited (Backward Citations)
US3448882A
Cited
US3471051A
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 |