Patent US3250425A successfully refreshed from Google Patents.
US3250425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable pull tab to break scored tear strip
Assignee: Continental Can Co Inc
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Filing: 1964-02-17
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Granted: 1966-05-10
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Expires: 1984-02-17
Abstract
No abstract record available.
Inventors
- 👤 Frederick J Stec
- 👤 John B Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:57
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
AN EASY OPENING CONTAINER ELEMENT HAVING A REMOVABLE PORTION DEFINED BY A WEAKENING LINE, SAID REMOVABLE PORTION INCLUDING A STARTING PORTION, A PULL TAB, A FASTENER SECURING SAID PULL TAB TO SAID STARTING PORTION FOR EFFECTING THE RUPTURE OF SAID CONTAINER ELEMENT ALONG SAID WEAKENING LINE AND FOR LIMITED PIVOTAL MOVEMENT OF SAID PULL TAB, AND SAID CONTAINER ELEMENT HAVING A PROJECTION DISPSOED RADIALLY OUTWARDLY OF SAID WEAKENING LINE IN THE PATH OF PIVOTAL MOVEMENT OF SAID PULL TAB AND ADAPTED TO BE ENGAGED BY SAID PULL TAB, SAID PROJECTION INCLUDING A TERMINAL RAMP GENERALLY OPPOSING SAID PULL TAB WHEREBY WHEN SAID PULL TAB IS PIVOTED AGAINST SAID PROJECTION, SAID PULL TAB WILL RIDE UP SAID RAMP AND ONTO SAID PROJECTION THEREBY PLACING A LIFTING FORCE ON SAID STARTING PORTION THROUGH SAID FASTENER SUFFICIENT TO EFFECT AN INITIAL RUPTURE OF THE CONTAINER ELEMENT.
Claim 2
Dependent Claim
143 words
AN EASY OPENING CONTAINER ELEMENT HAVING A REMOVABLE PORTION DEFINED BY A WEAKENING LINE, SAID REMOVABLE PORTION INCLUDING A STARTING PORTION, A PULL TAB, A FASTENER SECURING SAID PULL TAB TO SAID STARTING PORTION FOR EFFECTING THE RUPTURE OF SAID CONTAINER ELEMENT ALONG SAID WEAKENING LINE AND FOR LIMITED PIVOTAL MOVEMENT OF SAID PULL TAB, AND SAID CONTAINER ELEMENT HAVING A PROJECTION DISPSOED RADIALLY OUTWARDLY OF SAID WEAKENING LINE IN THE PATH OF PIVOTAL MOVEMENT OF SAID PULL TAB AND ADAPTED TO BE ENGAGED BY SAID PULL TAB, SAID PROJECTION INCLUDING A TERMINAL RAMP GENERALLY OPPOSING SAID PULL TAB WHEREBY WHEN SAID PULL TAB IS PIVOTED AGAINST SAID PROJECTION, SAID PULL TAB WILL RIDE UP SAID RAMP AND ONTO SAID PROJECTION THEREBY PLACING A LIFTING FORCE ON SAID STARTING PORTION THROUGH SAID FASTENER SUFFICIENT TO EFFECT AN INITIAL RUPTURE OF THE CONTAINER ELEMENT.
References Cited (Backward Citations)
US2029328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |