Patent US3237844A successfully refreshed from Google Patents.
US3237844A
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Assignee: Imperial Chemical Industries Ltd
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Filing: 1964-09-28
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Granted: 1966-03-01
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Expires: 1984-09-28
Abstract
No abstract record available.
Inventors
- 👤 Hughes Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:31
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN A PLASTIC BAG OF THE TYPE THAT IS CLOSED AT ITS ENDS BY HEAT SEALING, THE IMPROVEMENT COMPRISING A VENT MEANS IN AT LEAST ONE CORNER OF SAID PLASTIC BAG, SAID VENT MEANS COMPRISING AN APERTURE THROUGH THE CORNER OF AT LEAST ONE WALL OF SAID BAG FOR VENTING THE INTERIOR OF THE BAG AND THE ATMOSPHERE, A SEAM BETWEEN THE WALLS OF THE BAG AND IN A POSITION BETWEEN THE APERTURE AND THE REMAINDER OF SAID BAG, SAID SEAM FOLLOWING A DIAGONAL PATH, SAID PATH INTERSECTING IN END SEAM OF SAID BAG AND A SIDE FOLD OF SAID BAG SO AS TO CLOSE OFF A MINOR PORTION OF THE BAG INTERIOR IN THE REGION OF SAID APERTURE, AND AT LEAST ONE OPENING THROUGH SAID SEAM FOR PROVIDING A COMMUNICATION BETWEEN THE INTERIOR OF THE MINOR PORTION OF SAID BAG AND THE REMAINDER OF SAID BAG INTERIOR.
Claim 2
Dependent Claim
148 words
IN A PLASTIC BAG OF THE TYPE THAT IS CLOSED AT ITS ENDS BY HEAT SEALING, THE IMPROVEMENT COMPRISING A VENT MEANS IN AT LEAST ONE CORNER OF SAID PLASTIC BAG, SAID VENT MEANS COMPRISING AN APERTURE THROUGH THE CORNER OF AT LEAST ONE WALL OF SAID BAG FOR VENTING THE INTERIOR OF THE BAG AND THE ATMOSPHERE, A SEAM BETWEEN THE WALLS OF THE BAG AND IN A POSITION BETWEEN THE APERTURE AND THE REMAINDER OF SAID BAG, SAID SEAM FOLLOWING A DIAGONAL PATH, SAID PATH INTERSECTING IN END SEAM OF SAID BAG AND A SIDE FOLD OF SAID BAG SO AS TO CLOSE OFF A MINOR PORTION OF THE BAG INTERIOR IN THE REGION OF SAID APERTURE, AND AT LEAST ONE OPENING THROUGH SAID SEAM FOR PROVIDING A COMMUNICATION BETWEEN THE INTERIOR OF THE MINOR PORTION OF SAID BAG AND THE REMAINDER OF SAID BAG INTERIOR.
References Cited (Backward Citations)
US2361344A
Cited
US2541674A
Cited
US2997224A
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US3117711A
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US3149772A
Cited
US3133691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |