Patent US3280429A successfully refreshed from Google Patents.
US3280429A
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US
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Apparatus for making tubing
Assignee: FMC Corp
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Filing: 1962-10-01
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Granted: 1966-10-25
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Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Harold A Haley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:41
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/908; B29C48/03; B29C48/09; B29C48/10; B29C48/30; B29C48/32; B29C48/33; B29C48/885; B29C48/901; B29C48/902; B29C48/911; B29C48/9115; B29C48/912; B29C48/001; B29C48/0018; B29C48/0019
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
APPARATUS FOR EXTRUDING A TUBULAR PLASTIC FILM AND IMPARTING AN OSCILLATORY OR ROTATIVE MOVEMENT TO SAID FILM COMPRISING AN EXTRUSION DIE HAVING A TUBULAR ORIFICE AND A MANDREL OF GREATER DIAMETER THAN SAID TUBULAR ORIFICE; SAID MANDREL BEING SUPPORTED BY SAID DIE AND BEING POSITIONED WITHIN THE TUBULAR FILM EXTRUDED THROUGH SAID TUBULAR ORIFICE; THE INTERNAL SURFACE OF SAID TUBULAR FILM CONTACTING THE EXTERNAL SURFACE OF SAID MANDREL; AND MEANS FOR MOVING SAID MANDREL ABOUT THE AXIS OF SAID TUBULAR FILM AND CARRYING SAID TUBULAR FILM THEREWITH.
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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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |