US3106140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming multiwall bags
Assignee: Union Carbide Corp
•
Filing: 1961-04-28
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Granted: 1963-10-08
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Expires: 1981-04-28
Abstract
No abstract record available.
Inventors
- 👤 Francis E Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:57
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/04; Y; Y10; Y10S; Y10S493/00; Y10S493/916; Y10S493/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A METHOD OF MAKING A MULTIWALL LEAKPROOF BAG WHICH COMPRISES MAKING A LEAKPROOF CONSTRICTION AT AN INTERMEDIATE SECTION IN A LENGTH OF FLEXIBLE TUBULAR PLASTIC FILM TO FORM TWO CONNECTED TUBULAR SECTIONS WITH A LEAKPROOF BARRIER THEREBETWEEN, INSERTING AND END OF ONE OF SAID SECTIONS THROUGH A HOLE IN A STIFFENING MEMBER AND POSITIONING THE STIFFENING MEMBER ADJACENT TO THE CONSTRICTION, TURNING BACK THE END OF ONE OF SAID SECTIONS INSIDE OUT BEYOND THE CONSTRICTION AND OVER THE EXTERIOR SURFACE OF THE OTHER SECTION OF SAID TUBING, THEREBY FORMING A BAG WITH AN INNER AND OUTER BALL AND WITH THE STIFFENER POSITIONED AT THE BOTTOM OF THE BAG BETWEEN THE INNER AND OUTER WALLS OF THE BAG.
Claim 2
Independent Claim
117 words
A METHOD OF MAKING A MULTIWALL LEAKPROOF BAG WHICH COMPRISES MAKING A LEAKPROOF CONSTRICTION AT AN INTERMEDIATE SECTION IN A LENGTH OF FLEXIBLE TUBULAR PLASTIC FILM TO FORM TWO CONNECTED TUBULAR SECTIONS WITH A LEAKPROOF BARRIER THEREBETWEEN, INSERTING AND END OF ONE OF SAID SECTIONS THROUGH A HOLE IN A STIFFENING MEMBER AND POSITIONING THE STIFFENING MEMBER ADJACENT TO THE CONSTRICTION, TURNING BACK THE END OF ONE OF SAID SECTIONS INSIDE OUT BEYOND THE CONSTRICTION AND OVER THE EXTERIOR SURFACE OF THE OTHER SECTION OF SAID TUBING, THEREBY FORMING A BAG WITH AN INNER AND OUTER BALL AND WITH THE STIFFENER POSITIONED AT THE BOTTOM OF THE BAG BETWEEN THE INNER AND OUTER WALLS OF THE BAG.
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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) | 1966-10-07 | 1967-04-08 | 1967-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-07 | 1971-04-08 | 1971-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-07 | 1975-04-08 | 1975-10-08 | $7700.00 | Window Closed / Lapsed |