Patent US4785940A successfully refreshed from Google Patents.
US4785940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible bag with a pressure sensitive adhesive closure strip
Assignee: 3M Co
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Filing: 1987-07-02
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Granted: 1988-11-22
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Expires: 2007-07-02
Abstract
Abstract A flexible bag having front and back panels sealed along bottom and side edges. A pressure sensitive adhesive closure strip is adhered to the back panel and to the rear surface of the front panel. The front panel includes a transverse separation line intermediate the bottom edge of the bag and the closure strip. A portion of the front panel above the separation line may be removed from the bag so as to expose the closure strip for securing the back panel to the front surface of the front panel for closing the top of the bag.
Inventors
- 👤 Shari J. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:47
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/18; B65D33/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
A bag comprising: (a) a back panel having a front and rear surface, a front panel having a front and a rear surface, said back panel and said front panel being joined to form the bottom and sides of the bag; (b) a pressure sensitive adhesive closure strip adhered to said back panel and to said rear surface of said front panel, said closure strip having a bond strength to said back panel greater than the bond strength of said closure strip to said rear surface of said front panel; and (c) said front panel including a transverse separation line intermediate said closure strip and said bottom edge of the bag, whereby said front panel may be divided at said separation line and a portion of said front panel above the separation line removed from the bag to expose said closure strip for adhesively securing said back panel to said front surface of said front panel to close the top of the bag.
Claim 2
Dependent Claim
163 words
A bag comprising: (a) a back panel having a front and rear surface, a front panel having a front and a rear surface, said back panel and said front panel being joined to form the bottom and sides of the bag; (b) a pressure sensitive adhesive closure strip adhered to said back panel and to said rear surface of said front panel, said closure strip having a bond strength to said back panel greater than the bond strength of said closure strip to said rear surface of said front panel; and (c) said front panel including a transverse separation line intermediate said closure strip and said bottom edge of the bag, whereby said front panel may be divided at said separation line and a portion of said front panel above the separation line removed from the bag to expose said closure strip for adhesively securing said back panel to said front surface of said front panel to close the top of the bag.
Claim 3
Dependent Claim
53 words
The bag of claim 1, wherein said closure strip is adhered to said rear surface of said back panel, with a portion of said closure strip extending above said end edge of said back panel so as to be releasably adhered to said rear surface of said front panel above said separation line.
Claim 4
Dependent Claim
31 words
The bag of claim 1, wherein said closure strip is interposed between said front surface of said back panel and said rear surface of said front panel above said separation line.
Claim 5
Dependent Claim
39 words
The bag of claim 1, wherein the bond strength of said closure strip to said back panel and to said front surface of said front panel is greater than the tear strength of said front and said rear panels.
Claim 6
Dependent Claim
51 words
The bag of claim 1, further comprising a second pressure sensitive adhesive closure strip adhered to said front surface of said front panel and including a removable liner, for adhesive contact with said first closure strip with said liner removed so as to secure said back panel to said front panel.
Claim 7
Dependent Claim
32 words
The bag of claim 1, wherein said front surface of said front panel is treated to increase the bond strength of said closure strip to said front surface of said front panel.
Claim 8
Dependent Claim
42 words
The bag of claim 1, wherein said bond strength of said closure strip to said front surface of said front panel is less than the tear strength of said front panel enabling the bag to be reopened without damage to the bag.
Claim 9
Dependent Claim
19 words
The bag of claim 1, further comprising indicia on the portion of said front panel above said separation line.
References Cited (Backward Citations)
US2671602A
Cited
US2715493A
Cited
US2991001A
Cited
US3070280A
Cited
US3420433A
Cited
US3613874A
Cited
GB1354481A
Cited
US3942713A
Cited
US3990627A
Cited
US3915302A
Cited
US4348440A
Cited
GB2066208A
Cited
US4581007A
Cited
US4468811A
Cited
US4502599A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |