Patent US3568918A successfully refreshed from Google Patents.
US3568918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shopping bag having reinforced walls
Assignee: Individual
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Filing: 1969-02-04
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Granted: 1971-03-09
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Expires: 1989-02-04
Abstract
Abstract A collapsible shopping bag having four sides and a square bottom when opened out from a flattened state. It is formed by two layers of flexible and heat-sealing plastics foil with an intermediate stiffening sheet of Kraft paper inserted between such layers extending continuously across the bottom and along two opposite bag sides. The bag in flattened state has two sideforming walls connected by a transverse bellows fold to form the square bottom and the mating longitudinal edges of the walls and the ends of the bellows fold are closed by heat sealing of the plastic foil layers.
Inventors
- 👤 Karl Olof Blomqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:41
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/02; A; A45; A45C; A45C3/00; A45C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A collapsible shopping bag having four sides and a square bottom when opened out from a flattened state comprising two layers of flexible and heat sealing plastics foil, an intermediate stiffening sheet of Kraft paper inserted between said layers extending continuously only across said bottom and along two opposite bag sides, said bag in flattened state comprising two side-forming walls connected by a transverse bellows fold to form said square bottom, the mating longitudinal edges of said walls and the ends of said bellows fold being closed by heat sealing of said plastic foil layers.
Claim 2
Dependent Claim
95 words
A collapsible shopping bag having four sides and a square bottom when opened out from a flattened state comprising two layers of flexible and heat sealing plastics foil, an intermediate stiffening sheet of Kraft paper inserted between said layers extending continuously only across said bottom and along two opposite bag sides, said bag in flattened state comprising two side-forming walls connected by a transverse bellows fold to form said square bottom, the mating longitudinal edges of said walls and the ends of said bellows fold being closed by heat sealing of said plastic foil layers.
References Cited (Backward Citations)
US2815898A
Cited
US2766926A
Cited
US2821337A
Cited
US3067926A
Cited
GB1069268A
Cited
US3468470A
Cited
US3396901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |