Patent US3653536A successfully refreshed from Google Patents.
US3653536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easy opening device for a rectangular container end
Assignee: Alcoa Corp
•
Filing: 1970-08-31
•
Granted: 1972-04-04
•
Expires: 1990-08-31
Abstract
Abstract An easy opening rectangular container wall which has a line of weakness around its periphery defining a removable portion in the container wall and which has a tab attached to the removable portion in one corner, as by means of an integral rivet, and a downward embossment in the removable portion including a wing section spread outwardly from adjacent the attachment and a narrow tail section joined to the wing section.
Inventors
- 👤 Howard Dale Schrecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:01
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4011
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
In a rectangular container wall of deformable material having a line of weakness around its periphery defining a rectangular removable portion therein and having a tab attached to the removable portion in one corner thereof, the improvement comprising a downward embossment in the removable portion including an embossed wing section spread outwardly from adjacent the attachment of the tab to the removable portion, and an embossed tail section narrower than the wing section, the tail section being joined to the wing section and extending approximately to a line bisecting the nearest adjacent corner of the removable portion.
Claim 2
Dependent Claim
97 words
In a rectangular container wall of deformable material having a line of weakness around its periphery defining a rectangular removable portion therein and having a tab attached to the removable portion in one corner thereof, the improvement comprising a downward embossment in the removable portion including an embossed wing section spread outwardly from adjacent the attachment of the tab to the removable portion, and an embossed tail section narrower than the wing section, the tail section being joined to the wing section and extending approximately to a line bisecting the nearest adjacent corner of the removable portion.
Claim 3
Dependent Claim
23 words
A container wall combination as set forth in claim 1 in which said embossed tail section is shallower than said embossed wing section.
Claim 4
Dependent Claim
29 words
A container wall combination as set forth in claim 1 in which said tail section underlies the lifting end of the pull tab, thereby facilitating gripping of the tab.
Claim 5
Dependent Claim
38 words
A container wall combination as set forth in claim 1 in which said wing section is at least 0.015 inch deep and said tail section is shallower than said wing section but is at least 0.006 inch deep.
Claim 6
Dependent Claim
50 words
A container wall combination as set forth in claim 1 in which said embossed wing section has a flat bottom wall with opposite sides of the section extending along the corner-forming end and side of the removable portion, and said tail section extends along a line bisecting the tab-attachment corner.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |