Patent US3608439A successfully refreshed from Google Patents.
US3608439A
Expired / Lapsed
US
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Method of making a flexible pilfer proof closure construction for bags
Assignee: Individual
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Filing: 1970-02-18
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Granted: 1971-09-28
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Expires: 1990-02-18
Abstract
Abstract METHOD OF MAKING BAGS EACH WITH A RECLOSABLE OPENING WHEREIN A SHEET OF HEAT SEALABLE MATERIAL IS FORMED INTO A SPLIT TUBE, AND THE SPLIT OF THE TUBE IS COVERED WITH A CLOSURE STRIP WHICH IS SUBSEQUENTLY SECURED THERETO TO FORM A CLOSED TUBE, THE CLOSURE STRIP CONTAINING THREE WEBS WITH INTERLOCKING RIB AND GROOVE ELEMENTS DISPOSED ON ALL THREE WEBS WITH SAID ELEMENTS PLACED BETWEEN THE CENTER OF THE STRIP AND THE EXTREME MARGINAL EDGES, AND CONTAINING TWO PREFORMED TEAR LINES BETWEEN SAID INTERLOCKING ELEMENTS AND THEN HAVING THE WEBS OF THE CLOSURE STRIP HEAT SEALED AT THE CENTER OF THE CLOSURE STRIP AND FINALLY SECURING THE TUBE IN THE HEAT SEALED AREA.
Inventors
- 👤 Steven Ausnit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:21
CPC Classifications
B; B29; B29D; B29D5/00; B29D5/10
Claims Analysis
Total Claims: 0
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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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |