Patent US4141399A successfully refreshed from Google Patents.
US4141399A
Expired / Lapsed
US
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Expandable bag with internal biasing means
Assignee: Individual
•
Filing: 1977-12-05
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Granted: 1979-02-27
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Expires: 1997-12-05
Abstract
Abstract An expandable bag having a closure and insert in said bag, said insert comprising a pair of parallel sheet members, a first means biasing said parallel sheet members apart, and restraining means external to the bag and operable maintain the sheet members relatively closely spaced and the bag in a collapsed state whereupon, on removal of the restraining means, the biasing means cause the sheet members to move apart, whereby the bag is expanded.
Inventors
- 👤 Martin Zoland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:12
CPC Classifications
A; A45; A45C; A45C13/00; A45C13/004
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
An expandable bag having a closure and insert in said bag, said insert comprising a pair of parallel sheet members, a first means biasing said parallel sheet members apart, and restraining means external to the bag and operable to maintain the sheet members relatively closely spaced and the bag in a collapsed state whereupon, on removal of the restraining means, the biasing means cause the sheet members to move apart, whereby the bag is expanded.
Claim 2
Dependent Claim
75 words
An expandable bag having a closure and insert in said bag, said insert comprising a pair of parallel sheet members, a first means biasing said parallel sheet members apart, and restraining means external to the bag and operable to maintain the sheet members relatively closely spaced and the bag in a collapsed state whereupon, on removal of the restraining means, the biasing means cause the sheet members to move apart, whereby the bag is expanded.
Claim 3
Dependent Claim
21 words
A bag as claimed in claim 1 wherein the biasing means comprises a compression spring and the sheet members comprise cardboard.
Claim 4
Dependent Claim
19 words
A bag as claimed in claim 2 wherein the ends of the spring are affixed to respective sheet members.
Claim 5
Dependent Claim
20 words
A bag as claimed in claim 1 wherein the restraining means comprises a strip of paper extending around the bag.
Claim 6
Dependent Claim
18 words
A bundle of bags as defined in claim 4 wherein the strip extends around all of the bags.
References Cited (Backward Citations)
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US2024908A
Cited
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Cited
US2798579A
Cited
US3338398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |