US3874553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easy opening can end with embossed panel
Assignee: Alcoa Corp
•
Filing: 1973-07-19
•
Granted: 1975-04-01
•
Expires: 1993-07-19
Abstract
Abstract A can end is provided which has a circular score in it defining a removable panel, a rigid pull tab attached to the removable panel adjacent the score line, and an X-shaped embossment in the removable panel to control bending of the panel during removal.
Inventors
- 👤 Fred R Schultz
- 👤 James R Morran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:44
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4011; B65D2517/00; B65D2517/0001; B65D2517/0058; B65D2517/0074; B65D2517/0079
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
60 words
In an easy opening can end having a circular score line therein defining a removable panel and a substantially rigid pull tab attached to the removable panel adjacent the score line, the improvement comprising an X-shaped embossment substantially centered in the removable panel and the centerline of the tab substantially bisecting the included angle between two legs of the embossment.
Claim 2
Dependent Claim
60 words
In an easy opening can end having a circular score line therein defining a removable panel and a substantially rigid pull tab attached to the removable panel adjacent the score line, the improvement comprising an X-shaped embossment substantially centered in the removable panel and the centerline of the tab substantially bisecting the included angle between two legs of the embossment.
Claim 3
Dependent Claim
26 words
An easy opening can end as set forth in claim 1 in which a downwardly embossed finger well is located in the center of said embossment.
Claim 4
Dependent Claim
33 words
An easy opening can end as set forth in claim 2 in which said finger is substantially square and the legs of the embossment extend radially from the corners of the finger well.
Claim 5
Dependent Claim
68 words
An easy opening can end having a circular score line defining a removable panel and a tab attached to the removable panel near the score line, and further having an X-shaped embossment substantially centered in the removable panel and oriented so that a diametrical line drawn through the means for attaching the pull tab to the removable panel bisects the included angle between two legs of the embossment.
Claim 6
Dependent Claim
68 words
An easy opening can end having a circular score line defining a removable panel and a tab attached to the removable panel near the score line, and further having an X-shaped embossment substantially centered in the removable panel and oriented so that a diametrical line drawn through the means for attaching the pull tab to the removable panel bisects the included angle between two legs of the embossment.
Claim 7
Dependent Claim
18 words
An easy opening can end as set forth in claim 4 in which said tab is substantially rigid.
Claim 8
Dependent Claim
24 words
An easy opening can end as set forth in claim 4 in which the legs of said embossment have included angles of approximately 90*therebetween.
Claim 9
Dependent Claim
28 words
An easy opening can end as set forth in claim 4 in which the legs of the embossment extend outwardly to within close proximity of said score line.
Claim 10
Dependent Claim
20 words
An easy opening end as set forth in claim 4 in which said embossment is formed downward in the end.
References Cited (Backward Citations)
US3485410A
Cited
US3662916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |