US3552638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peel-open thermoplastic package for sterilized articles
Assignee: Millennium Petrochemicals Inc
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Filing: 1968-08-14
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Granted: 1971-01-05
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Expires: 1988-08-14
Abstract
Abstract A peel-open bag formed of two opposing panels of laminated plastic layers. The panels are heat-sealed to one another along their tops, bottoms and sides to enclose a sterilized article. The laminated layers are of diverse plastics, the interior layers of which form a heat seal which is stronger than the bonding strength between the laminated layers. In order to open the bag, the panels are peeled apart, causing one of the layers to delaminate and tear along the heat seal. The panels are formed of laminates of polyethylene on the inside and Surlyn A on the outside.
Inventors
- 👤 John J Quackenbush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:03
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/38; A; A61; A61B; A61B50/00; A61B50/30; A61F; A61F15/00; A61F15/001; A61B2050/005; A61B2050/0065; A61B2050/314; A61B2050/316; C; C12; C12M; C12M23/00; C12M23/02; C12M23/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
A peel-open, ethylene-oxide permeable bag for sterilized articles comprising a first bag panel, a second bag panel, means joining the sides, top and bottom of said first and second bag panels including at least one heat seal; said first bag panel consisting of interior and exterior layers of a first and second thermoplastic material, respectively; the interior of said second panel being of a thermoplastic material characterized in forming a heat seal to said interior layer having a first adhesion strength; said first and second materials characterized in laminating to one another with a second adhesion strength; said first adhesion strength greater than said second adhesion strength, whereby said bag can be opened by peeling said panels apart with said first and second materials delaminating along said at least one heat seal.
Claim 2
Dependent Claim
132 words
A peel-open, ethylene-oxide permeable bag for sterilized articles comprising a first bag panel, a second bag panel, means joining the sides, top and bottom of said first and second bag panels including at least one heat seal; said first bag panel consisting of interior and exterior layers of a first and second thermoplastic material, respectively; the interior of said second panel being of a thermoplastic material characterized in forming a heat seal to said interior layer having a first adhesion strength; said first and second materials characterized in laminating to one another with a second adhesion strength; said first adhesion strength greater than said second adhesion strength, whereby said bag can be opened by peeling said panels apart with said first and second materials delaminating along said at least one heat seal.
Claim 3
Dependent Claim
24 words
The bag of claim 1 wherein said second panel is formed of interior and exterior layers of said first and second thermoplastic materials, respectively.
Claim 4
Dependent Claim
24 words
The bag of claim 1 wherein said at least one heat seal extends along the sides and top of said first and second panels.
Claim 5
Dependent Claim
13 words
The bag of claim 1 wherein said first material is low density polyethylene.
Claim 6
Dependent Claim
31 words
The bag of claim 1 wherein said first material is low-density polyethylene and wherein said second material is an ionic crosslinked ethylene acrylic copolymer containing group 1 or 2 metallic ions.
Claim 7
Dependent Claim
12 words
The bag of claim 2 wherein said first material is low-density polyethylene.
Claim 8
Dependent Claim
31 words
The bag of claim 2 wherein said first material is low-density polyethylene and wherein said second material is an ionic crosslinked ethylene acrylic copolymer containing group 1 or 2 metallic ions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |