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US3712533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tear top opening carton
Assignee: Somerville Industries Ltd
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Filing: 1971-01-29
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Granted: 1973-01-23
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Expires: 1991-01-29
Abstract
Abstract A top-opening paperboard carton having a top wall formed of overlapped end wall and side wall flaps, the latter overlying the former and having oblique lines of weakness arranged parallel to and above angled side edge portions on the end wall flaps, and finger entry points in the top wall whereby the end wall flaps may be engaged by the fingers and pulled upwardly to tear the side wall flaps along the lines of weakness.
Inventors
- 👤 W Skillen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:51
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/54; B65D5/44; B65D5/46; B65D5/46072; B65D5/46184
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
28 words
A paperboard carton as claimed in claim 1 in which the free end of said end flaps is the small dimensions of a truncated portion of a triangle.
Claim 2
Dependent Claim
31 words
A paperboard carton as claimed in claim 1 in which said finger entry points consist of transverse cuts and angled crease lines in the free edges of said side wall flaps.
Claim 3
Dependent Claim
31 words
A paperboard carton as claimed in claim 2 in which said finger entry points consist of transverse cuts and angled crease lines in the free edges of said side wall flaps.
References Cited (Backward Citations)
US2287520A
Cited
US2713454A
Cited
US2753104A
Cited
US3002613A
Cited
US3355089A
Cited
US3580482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |