US3330720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure liner
Assignee: 3M Co
•
Filing: 1965-05-18
•
Granted: 1967-07-11
•
Expires: 1985-05-18
Abstract
No abstract record available.
Inventors
- 👤 Edward J Stevens
- 👤 Gordon C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:19
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/04; B65D41/0435; B65D41/045; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997; Y10T428/25; Y10T428/254; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2891
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
A SHEET CONSTRUCTION FOR USE AS A CLOSURE LINER THAT MAY BE ADHERED BY PRESSURE TO A CONTAINER OVER THE CONTAINER ORIFICE COMPRISING A RESILIENT COMPRESSIBLE BACKING THAT IS BETWEEN ABOUT 20 AND 55 MILS IN THICKNESS AND CARRIES ON ONE SURFACE A LAYER OF WAX, AND AN INNERSEAL MEMBRANE SHEET WEAKLY ADHERED TO THE BACKING BY THE WAX LAYER AND HAVING ON THE EXPOSED SURFACE A NORMALLY NON-TACKY LAYER OF POLYMERIC MATERIAL BASED ON POLYVINYL ACETATE, SMALL PRESSURE-RUPTURABLE CAPSULES BETWEEN ABOUT 50 AND 170 MICRONS IN DIAMETER AND CONTAINING A PLASTICIZER FOR POLYVINYL ACETATE BEING DISPERSED IN SAID LAYER WHEREBY WHEN THE INNERSEAL SURFACE OF THE LINER IS PRESSED AGAINST A CONTAINER LIP THE POLYVINYL ACETATE IS MADE TACKY IN THE AREA OF PRESSURE AND THE LINER IS ADHERED TO THE CONTAINER.
References Cited (Backward Citations)
US2715474A
Cited
US2907682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |