Patent US3355768A successfully refreshed from Google Patents.
US3355768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making thermoplastic films
Assignee: FMC Corp
•
Filing: 1964-06-05
•
Granted: 1967-12-05
•
Expires: 1984-06-05
Abstract
No abstract record available.
Inventors
- 👤 Daniel J Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:52
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/001; B29C48/0022; B29C2793/00; B29C2793/0063; B29C48/0018; B29C48/03; B29C48/09; B29C48/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
APPARATUS FOR MAKING ORIENTED FILM FROM THERMOPLASTIC POLYMERIC MATERIALS INCLUDING AN ANNULAR DIE, MEANS FOR CONTINOUSLY EXTRUDING HEATED THERMOPLASTIC MATERIAL FROM THE ANNULAR DIE IN THE FORM OF A TUBING, MEANS SPACED FROM SAID DIE FOR SLITTING THE EXTRUDED TUBING INTO AT LEAST TWO FILMS, MEANS ENGAGING WITH THE FILMS FOR ADVANCING THE SAME AWAY FROM SAID SLITTING MEANS, AT LEAST TWO MOVABLE ENDLESS CABLES, EACH OF SAID CABLES HAVING ONE REACH EXTENDING THROUGH SAID ANNULAR DIE FOR ENGAGING WITH THE INTERNAL SURFACE OF THE EXTRUDED TUBING AND MEANS FOR DIRECTING SAID REACHES OF THE ENDLESS CABLES ALONG DIVERGING PATHS TO THEREBY STRETCH THE TUBING IN A TRANSVERSE DIRECTION CONCOMITANTLY WITH ITS ADVANCEMENT.
Claim 2
Dependent Claim
113 words
APPARATUS FOR MAKING ORIENTED FILM FROM THERMOPLASTIC POLYMERIC MATERIALS INCLUDING AN ANNULAR DIE, MEANS FOR CONTINOUSLY EXTRUDING HEATED THERMOPLASTIC MATERIAL FROM THE ANNULAR DIE IN THE FORM OF A TUBING, MEANS SPACED FROM SAID DIE FOR SLITTING THE EXTRUDED TUBING INTO AT LEAST TWO FILMS, MEANS ENGAGING WITH THE FILMS FOR ADVANCING THE SAME AWAY FROM SAID SLITTING MEANS, AT LEAST TWO MOVABLE ENDLESS CABLES, EACH OF SAID CABLES HAVING ONE REACH EXTENDING THROUGH SAID ANNULAR DIE FOR ENGAGING WITH THE INTERNAL SURFACE OF THE EXTRUDED TUBING AND MEANS FOR DIRECTING SAID REACHES OF THE ENDLESS CABLES ALONG DIVERGING PATHS TO THEREBY STRETCH THE TUBING IN A TRANSVERSE DIRECTION CONCOMITANTLY WITH ITS ADVANCEMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |