Patent US3618478A successfully refreshed from Google Patents.
US3618478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three dimensional bag with reinforced bottom and method of forming same
Assignee: Continental Can Co Inc
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Filing: 1969-07-31
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Granted: 1971-11-09
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Expires: 1989-07-31
Abstract
Abstract A SIDE SEALED, GUSSETED BOTTOM PLASTIC BAG AND THE METHOD OF FORMING THE SAME WHEREIN THE BOTTOM FORMING SEAMS ARE REINFORCED BY PROVIDING DIAGONAL FLAT SEALS INWARDLY FROM THE JUNCTION AREA OF THE GUSSET INNER FOLD LINE AND THE SIDE SEAL LINES, TO THE GUSSET OUTER FOLD LINES WITH THE SIDE SEALS CONNECTING THE ENDS OF THE GUSSET WALLS TO THE SIDE WALLS BEING CONTINUED TO THE OUTER GUSSET FOLDS, SO AS TO RELIVE THE STRESS AT THE JUNCTION POINT WHEN THE BAG IS FILLED AND THE BOTTOM OPENED OUT INTO SQUARE OR RECTANGULAR FORM.
Inventors
- 👤 Thomas E Piazze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:59
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/60; B31B70/64; B31B70/642; B31B2155/00; B31B2160/00; B31B2160/10; B31B2160/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |