Patent US3903335A successfully refreshed from Google Patents.
US3903335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealed package
Assignee: Lawson Mardon Flexible Ltd
•
Filing: 1973-04-27
•
Granted: 1975-09-02
•
Expires: 1993-04-27
Abstract
Abstract The invention relates to a package for a sterilised disposable article, the package having opposing base materials bonded together along marginal portions by a heat sealed adhesive and peelable apart to open the package. One of the base materials is paper which has been neutrally sized to prevent absorption of the adhesive. The outer surface of the paper is preferably machine glazed for porosity and pore size control. The adhesive may be applied all over the unglazed surface of the paper but in a discontinuous form to permit passage of a sterilising gas into the sealed package.
Inventors
- 👤 Christopher Ian Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:17
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/52; B65D75/58; B65D75/5855; A; A61; A61L; A61L2/00; A61L2/16; A61L2/20; C; C09; C09J; C09J5/00; C09J5/06; B65D75/28; B65D75/30; Y; Y10; Y10S; Y10S206/00; Y10S206/819
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
A PACKAGE COMPRISING OPPOSING BASE MATERIALS BONDED TOGETHER AT MARGINAL PORTIONS BY MEANS OF A HEAT SEALED ADHESICE WHICH ALLOWS THE BASE MATERIAL TO BE PEELED APART CLEANLY TO OPEN THE PACKAGE, ONE OF THE BASE MATERIALS COMPRISING PAPER WHICH HAS BEEN SIZED UNDER NEUTRAL CONDITIONS WITH A PH VALUE IN THE RANGES 7.2 TO 8.3 INCLUSIVVE USING AN ALKYL KETENE DIMER, AND WHICH HAS A MACHINE GLAZED SURFACE.
Claim 2
Dependent Claim
69 words
A PACKAGE COMPRISING OPPOSING BASE MATERIALS BONDED TOGETHER AT MARGINAL PORTIONS BY MEANS OF A HEAT SEALED ADHESICE WHICH ALLOWS THE BASE MATERIAL TO BE PEELED APART CLEANLY TO OPEN THE PACKAGE, ONE OF THE BASE MATERIALS COMPRISING PAPER WHICH HAS BEEN SIZED UNDER NEUTRAL CONDITIONS WITH A PH VALUE IN THE RANGES 7.2 TO 8.3 INCLUSIVVE USING AN ALKYL KETENE DIMER, AND WHICH HAS A MACHINE GLAZED SURFACE.
Claim 3
Dependent Claim
23 words
a package according to claim 1, wherein the machine glazed surface of the paper base material is an outer surface of the package.
Claim 4
Dependent Claim
33 words
A package according to claim 1, wherein the adhesive was applied to the unglazed surface of the neutrally sized paper in a discontinuous form to allow a sterilising gas to pass through it.
Claim 5
Dependent Claim
17 words
A package according to claim 3, wherein the adhesive was applied in grid form or dotted form.
Claim 6
Dependent Claim
37 words
A package according to claim 1, wherein the neutrally sized paper, excluding the sizing, has a weight not less than 55g/m2, a maximum pore size not greater than 10 mym, and a Bendtsen porosity of 60-120 cc/min.
Claim 7
Dependent Claim
67 words
A base material for a package as claimed in claim 3, wherein the base material is a neutrally sized paper which has been sized under neutral conditions with a pH value in the range 7.2 to 8.3 inclusive using an alkyl ketene dimer, which has been machine glazed on one surface, and which has, on its unglazed surface, a heat sealable adhesive applied in a discontinuous form.
References Cited (Backward Citations)
US3217871A
Cited
US3485638A
Cited
US3578239A
Cited
US3779791A
Cited
US3595465A
Cited
US3685720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |