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US3247997A Expired / Lapsed US ⏱️ 0.0 years remaining

Easy opening pull tab can end with wide tear strip

Assignee: Continental Can Co Inc
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Filing: 1964-01-03
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Granted: 1966-04-26
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Expires: 1984-01-03
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Abstract

No abstract record available.

Inventors

  • 👤 John S Bozek

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 12:13
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4011; B65D17/34; B65D17/347; B65D17/353; B65D17/36; B65D17/38; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49876

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 235 words
A CONTAINER END, A TEAR STRIP DEFINED IN SAID CONTAINER END BY AN OUTER PERIPHERAL WEAKENING LINE AND AN INNER WEAKENING LINE CONNECTED TOGETHER BY A CONNECTING STARTING WEAKENING LINE IN PART DEFINING A STARTING END OF SAID TEAR STRIP, SAID CONTAINER END HAVING AN OFFSET CENTRAL PORTION HAVING A BORDER OF WHICH A MAJOR PORTION THEREOF CONFORMS IN OUTLINE TO SAID INNER WEAKENING LINE, SAID OFFSET CENTRAL PORTION SITFFENING SAID CAN END AND THEREBY RESISTING PARTING OF SAID WEAKENING LINES, AND SAID INNER WEAKENING LINE TERMINATING INTO SAID OFFSET PORTION, WITH SAID OFFSET CENTRAL PORTION BEING CARRIED BY A TERMINAL PORTION OF SAID TEAR STRIP AFTER THE COMPLETE SEPARATION OF SAID INNER WEAKENING LINE AND MAINTAINING ITS NORMAL RELATIONSHIP TO SAID TEAR STRIP DURING THE FINAL STAGES OF TEAR STRIP REMOVAL WHEREBY TILTING OF SAID OFFSET CENTRAL PORTION DOWN INTO THE INTERIOR OF AN ASSOCIATED CONTAINER IS PREVENTED, SAID OUTER WEAKENING LINE BEING OF A MAXIMUM STRENGTH ADJACENT TO BUT SPACED FROM A TERMINAL END THEREOF WHEREBY DURING AN OPENING OPERATION THERE IS A MOMENTARY SLOWING DOWN OF THE OPENING OPERATION PRIOR TO THE FINAL REMOVAL OF SAID TEAR STRIP AND SPRINGING OF SAID CENTRAL PORTION TOWARDS THE STARTING END OF SAID TEAR STRIP IS RESTRICTED, AND SAID OUTER WEAKENING LINE BEING OF A REDUCED STRENGTH BETWEEN SAID MAXIMUM STRENGTH PORTION AND SAID TERMINAL END TO FACILITATE THE FINAL REMOVAL OF SAID TEAR STRIP.
Claim 2
Dependent Claim 235 words
A CONTAINER END, A TEAR STRIP DEFINED IN SAID CONTAINER END BY AN OUTER PERIPHERAL WEAKENING LINE AND AN INNER WEAKENING LINE CONNECTED TOGETHER BY A CONNECTING STARTING WEAKENING LINE IN PART DEFINING A STARTING END OF SAID TEAR STRIP, SAID CONTAINER END HAVING AN OFFSET CENTRAL PORTION HAVING A BORDER OF WHICH A MAJOR PORTION THEREOF CONFORMS IN OUTLINE TO SAID INNER WEAKENING LINE, SAID OFFSET CENTRAL PORTION SITFFENING SAID CAN END AND THEREBY RESISTING PARTING OF SAID WEAKENING LINES, AND SAID INNER WEAKENING LINE TERMINATING INTO SAID OFFSET PORTION, WITH SAID OFFSET CENTRAL PORTION BEING CARRIED BY A TERMINAL PORTION OF SAID TEAR STRIP AFTER THE COMPLETE SEPARATION OF SAID INNER WEAKENING LINE AND MAINTAINING ITS NORMAL RELATIONSHIP TO SAID TEAR STRIP DURING THE FINAL STAGES OF TEAR STRIP REMOVAL WHEREBY TILTING OF SAID OFFSET CENTRAL PORTION DOWN INTO THE INTERIOR OF AN ASSOCIATED CONTAINER IS PREVENTED, SAID OUTER WEAKENING LINE BEING OF A MAXIMUM STRENGTH ADJACENT TO BUT SPACED FROM A TERMINAL END THEREOF WHEREBY DURING AN OPENING OPERATION THERE IS A MOMENTARY SLOWING DOWN OF THE OPENING OPERATION PRIOR TO THE FINAL REMOVAL OF SAID TEAR STRIP AND SPRINGING OF SAID CENTRAL PORTION TOWARDS THE STARTING END OF SAID TEAR STRIP IS RESTRICTED, AND SAID OUTER WEAKENING LINE BEING OF A REDUCED STRENGTH BETWEEN SAID MAXIMUM STRENGTH PORTION AND SAID TERMINAL END TO FACILITATE THE FINAL REMOVAL OF SAID TEAR STRIP.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1969-04-25 1969-10-25 1970-04-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1973-04-25 1973-10-25 1974-04-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1977-04-25 1977-10-25 1978-04-26 $7700.00 Window Closed / Lapsed

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