US3687358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manually openable leakproof package construction
Assignee: Cadillac Products Inc
•
Filing: 1971-05-27
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Granted: 1972-08-29
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Expires: 1991-05-27
Abstract
Abstract A manually openable leakproof package construction comprising perforations across one portion of the construction with the perforations leaving a sufficiently weakened portion such that the package may be manually torn open across the perforations, a manually frangible layer of leakproof material such as plastic overlying said perforations, and with the leakproof layer acting to seal off the perforated portion such that the package is leakproof prior to the time the package is manually torn open.
Inventors
- 👤 Anton Wink
- 👤 Robert J Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:31
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/52; B65D75/58; B65D75/5805; B65D75/5816; B65D75/5827; B65D75/5833; B65D75/04; B65D75/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
66 words
A manually openable leakproof package means comprising: means defining a materially weakened portion in said package means, said weakened portion being sufficiently weakened that said package means may be manually torn open at said weakened portion, a manually frangible layer of leakproof material overlying said weakened portion, and means sealing said frangible layer to said package, said sealing being continuous and fully surrounding said weakened portion.
Claim 2
Dependent Claim
66 words
A manually openable leakproof package means comprising: means defining a materially weakened portion in said package means, said weakened portion being sufficiently weakened that said package means may be manually torn open at said weakened portion, a manually frangible layer of leakproof material overlying said weakened portion, and means sealing said frangible layer to said package, said sealing being continuous and fully surrounding said weakened portion.
Claim 3
Dependent Claim
13 words
The package means of claim 1 wherein, it is of double wall construction.
Claim 4
Dependent Claim
18 words
The package means of claim 1 wherein, said frangible layer is on the outside of the package means.
Claim 5
Dependent Claim
18 words
The package means of claim 2 wherein, said frangible layer is on the inside of the package means.
Claim 6
Dependent Claim
89 words
A manually openable leakproof plastic bag, of single or double wall construction, comprising: a plastic material means forming the main construction of the bag and said plastic material being of relatively nonfrangible material, perforation means in at least one portion of the bag construction, leakproof means overlying said perforation means and being sealed to said bag to prevent any leakage therethrough, said overlying leakproof means being relatively frangible such that it may be subjected to tearing along with essentially simultaneous tearing of the perforation means to open the bag.
Claim 7
Dependent Claim
89 words
A manually openable leakproof plastic bag, of single or double wall construction, comprising: a plastic material means forming the main construction of the bag and said plastic material being of relatively nonfrangible material, perforation means in at least one portion of the bag construction, leakproof means overlying said perforation means and being sealed to said bag to prevent any leakage therethrough, said overlying leakproof means being relatively frangible such that it may be subjected to tearing along with essentially simultaneous tearing of the perforation means to open the bag.
Claim 8
Dependent Claim
12 words
The bag of claim 5 wherein, it is of double wall construction.
Claim 9
Dependent Claim
18 words
The bag of claim 5 wherein, said overlying leakproof means are on the outside of the plastic bag.
Claim 10
Dependent Claim
18 words
The bag of claim 6 wherein, said overlying leakproof means are on the inside of the plastic bag.
Claim 11
Dependent Claim
42 words
The package means of claim 1 wherein a tear open spout means is formed on at least one side of the package means by a wrap around tearable weakened portion and corresponding wrap around manually frangible layer which overlies said weakened portion.
Claim 12
Dependent Claim
45 words
The package means of claim 1 wherein a tear open means is included in at least one side wall of the package means and wherein said tear open means includes a manually grippable tear open strip which can be pulled to open the package means.
Claim 13
Dependent Claim
41 words
The package means of claim 1 wherein a tear off portIon extends across the entire top of the package means and which tear off portion is capable of being manually torn off to open the entire top of the package means.
References Cited (Backward Citations)
US1959364A
Cited
US2789728A
Cited
US2992118A
Cited
US3175752A
Cited
US3349993A
Cited
US3379360A
Cited
US3472369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |