US4766018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Readily peelable, sterilizable packages
Assignee: Dow Produktions und Vertriebs GmbH and Co OHG
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Filing: 1986-12-16
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Granted: 1988-08-23
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Expires: 2006-12-16
Abstract
Abstract Readily peelable and sterilizable packages composed of two multi-layer sheets which are attached to one another by sealing in the zone regions and in which one sealing layer comprises an ethylene/1-butene copolymer and the other polypropylene or a propylene/ethylene copolymer.
Inventors
- 👤 Thomas Hinrichsen
- 👤 Holger Preiss
- 👤 Harry Witte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:02
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/52; B65D75/58; B65D75/5855; B32; B32B; B32B27/00; B32B27/32; B65D75/28; B65D75/30; B65D2577/00; B65D2577/10; B65D2577/20; B65D2577/2025; B65D2577/2066; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/1379; Y10T428/1383; Y10T428/14; Y10T428/1452; Y10T428/28; Y10T428/2804; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31725; Y10T428/3175; Y10T428/31757; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31909
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A readily peelable and sterilizable package composed of a deep-drawn tray and a lid joined to one another along their edges, each of said tray and said lid comprising a core and at least one sealing layer, the sealing layer of one of the tray and the lid comprising essentially an ethylene/1-butene copolymer and the sealing layer of the other of the tray and the lid comprising essentially a polypropylene or a propylene/ethylene copolymer, the difference between the sealing layers permitting them to be separated so as to separate the lid from the tray.
Claim 2
Dependent Claim
94 words
A readily peelable and sterilizable package composed of a deep-drawn tray and a lid joined to one another along their edges, each of said tray and said lid comprising a core and at least one sealing layer, the sealing layer of one of the tray and the lid comprising essentially an ethylene/1-butene copolymer and the sealing layer of the other of the tray and the lid comprising essentially a polypropylene or a propylene/ethylene copolymer, the difference between the sealing layers permitting them to be separated so as to separate the lid from the tray.
Claim 3
Dependent Claim
16 words
A package according to claim 1, in which the lid is provided with a tear-off tab.
Claim 4
Dependent Claim
34 words
A package according to claim 1, in which the core of said tray and of said lid is formed of a partly crystalline polyamide, a polyester, a propylene polymer, a cellulose film or aluminum.
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) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |