US3686060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer wrapping sheet comprising a plastic film,a bitumen layer and a kraft paper layer;the layers being non-coextensive on one edge
Assignee: Kalle GmbH and Co KG
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Filing: 1971-03-08
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Granted: 1972-08-22
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Expires: 1991-03-08
Abstract
Abstract THE PRESENT INVENTION RELATES TO A LAMINATED MULTILAYER WRAPPING SHEET FOR LIGHT-SENSITIVE PAPER COMPRISING A FLEXIBLE PLASTIC LAYER, AN INTERMEDIATE BITUMEN LAYER AND AN OUTER LAYER OF KRAFT PAPER. THE LAMINATE HAS A MARGINAL ZONE OF PAPER FREE OF PLASTIC AND BITUMEN AND THE PLASTIC LAYER EXTENDS BEYOND THE BITUMEN LAYER IN THE DIRECTION OF THE MARGINAL ZONE OF PAPER.
Inventors
- 👤 Edgar Gurtler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:44
CPC Classifications
G; G03; G03C; G03C3/00; B; B32; B32B; B32B27/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24752; Y10T428/24769; Y10T428/24777; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31815; Y10T428/31819; Y10T428/31823
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |