Patent US1679891A successfully refreshed from Google Patents.
US3334553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing flexible bag
Assignee: Union Carbide Corp
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Filing: 1964-12-07
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Granted: 1967-08-08
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Expires: 1984-12-07
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Hewitt
- 👤 Harry P Eichin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:29
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/52; B65D75/58; B65D75/5861; B65D75/5866
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD FOR PRODUCING A BAG FROM A FLATTENED FLEXIBLE TUBE COMPRISING: (A) SLITTING A FIRST END OF SAID FLATTENED TUBE TRANSVERSELY TO FORM A FLAP THEREON; (B) SPIRALLY WINDING SAID FLAP TO FORM A TUBULAR SPOUT OPENING INTO SAID TUBE; (C) SEALING TOGETHER THE ADJACENT LAYERS OF SAID TUBULAR SPOUT; (D) SEALING SAID FIRST END OF SAID FLATTENED TUBE TRANSVERSELY FROM SAID SPOUT; AND (E) SEALING THE SECOND END OF SAID FLATTENED TUBE TRANSVERSELY.
Claim 2
Independent Claim
75 words
A METHOD FOR PRODUCING A BAG FROM A FLATTENED FLEXIBLE TUBE COMPRISING: (A) SLITTING A FIRST END OF SAID FLATTENED TUBE TRANSVERSELY TO FORM A FLAP THEREON; (B) SPIRALLY WINDING SAID FLAP TO FORM A TUBULAR SPOUT OPENING INTO SAID TUBE; (C) SEALING TOGETHER THE ADJACENT LAYERS OF SAID TUBULAR SPOUT; (D) SEALING SAID FIRST END OF SAID FLATTENED TUBE TRANSVERSELY FROM SAID SPOUT; AND (E) SEALING THE SECOND END OF SAID FLATTENED TUBE TRANSVERSELY.
References Cited (Backward Citations)
US2998340A
Cited
US3183797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |