US3740306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-layer packaging film with intermediate protective layer
Assignee: BRH Corp
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Filing: 1971-08-06
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Granted: 1973-06-19
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Expires: 1991-08-06
Abstract
Abstract A PACKAGING FILM CAPABLE OF BEING FORMED INTO A COLLAPSIBLE CONTAINER, SUCH AS A TOOTHPASE TUBE, THAT INCLUDES LAYERS OF METAL FOIL, CASEIN ADMIXED WITH AN ELASTOMERIC COMPOUND, ADHESIVE AND HEAT SEALABLE MATERIAL JOINED TOGETHER, AND WHICH IS CHARACTERIZED AS BEING ABLE TO WITHSTAND PROLONGED STORAGE OF FLUORIDE-CONTAINING TOOTHPASES WITHOUT ADVERSE DELAMINATION OF THE LAYERS. THE CASEIN-ELASTOMER LAYER ACTS AS A PROTECTIVE LAYER THAT PROVIDES RETARDATION OF DELAMINATION OF THE OTHER LAYERS OF THE FILM WHEN USED IN A PACKAGE FOR FLUORIDE TOOTHPASES.
Inventors
- 👤 P Kosbab
- 👤 R Roach
- 👤 P Laumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:26
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B32B27/00; B32B15/00; B32B15/04; B32B15/06; B32B15/20; B32B25/00; B32B25/04; B32B25/08; B32B25/18; B32B27/32; B65; B65D; B65D35/00; B65D35/02; B65D35/10; B32B2311/00; B32B2311/24; B32B2323/00; B32B2323/04; B32B2323/043; B32B2323/046; B32B2323/10; B32B2553/00; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2852; Y10T428/2896; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |