US3078201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seam structure for a flexible bag
Assignee: Midwest Research Institute
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Filing: 1960-03-21
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Granted: 1963-02-19
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Expires: 1980-03-21
Abstract
No abstract record available.
Inventors
- 👤 Howard W Christie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:33
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/305; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/32; B29C66/328; B29C66/3282; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/70; B29C66/72; B29C66/723; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81421; B29C66/81422; B29C66/81427; B29C66/7232; B29C66/72321; B29C66/7234; B29C66/72343; B29C66/83; B29C66/832; B29C66/8322; B29C66/83221; B29L; B29L2009/00; B29L2009/003; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24521; Y10T428/24537; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A SEAM STRUCTURE FOR A FLEXIBLE BAG COMPRISING FIRST AND SECOND SHEETS EACH HAVING LAYERS WITH ONE LAYER FORMED OF A NON-FUSIBLE MATERIAL AND AN INNER LAYER FORMED OF A FUSIBLE PLASTIC OF A THICKNESS IN THE RANGE OF 0.001 TO 0.005 INCH, SAID SHEETS POSITIONED WITH SAID INNER LAYERS IN FACING RELATIONSHIP, A SEAM LINE ACROSS SAID SHEETS CHARACTERIZED BY A SUBSTANTIAL ABSENCE OF SAID INNER LAYERS AND A FILLET ON AT LEAST ONE SIDE OF SAIID SEAM LINE FORMED OF THE MATERIAL OF SAID INNER LAYERS AND BEING INTERGRAL THEREWITH AND HAVING A CURVED INNER SURFACE SO THAT FORCE TENDING TO SEPARATE THE SEAM ARE AT LEAST PARTLY TRANSFORMED FROM PEELING LOADS TO SHEAR LOADS, SAID INNER LAYERS BEING UNJOIND BESIDE SAID FILLET OUTWARDLY OF SAID SEAM LINE.
Claim 2
Dependent Claim
130 words
A SEAM STRUCTURE FOR A FLEXIBLE BAG COMPRISING FIRST AND SECOND SHEETS EACH HAVING LAYERS WITH ONE LAYER FORMED OF A NON-FUSIBLE MATERIAL AND AN INNER LAYER FORMED OF A FUSIBLE PLASTIC OF A THICKNESS IN THE RANGE OF 0.001 TO 0.005 INCH, SAID SHEETS POSITIONED WITH SAID INNER LAYERS IN FACING RELATIONSHIP, A SEAM LINE ACROSS SAID SHEETS CHARACTERIZED BY A SUBSTANTIAL ABSENCE OF SAID INNER LAYERS AND A FILLET ON AT LEAST ONE SIDE OF SAIID SEAM LINE FORMED OF THE MATERIAL OF SAID INNER LAYERS AND BEING INTERGRAL THEREWITH AND HAVING A CURVED INNER SURFACE SO THAT FORCE TENDING TO SEPARATE THE SEAM ARE AT LEAST PARTLY TRANSFORMED FROM PEELING LOADS TO SHEAR LOADS, SAID INNER LAYERS BEING UNJOIND BESIDE SAID FILLET OUTWARDLY OF SAID SEAM LINE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |