US3238284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film manufacture
Assignee: EIDP Inc
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Filing: 1963-09-30
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Granted: 1966-03-01
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Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 James L Sutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:49
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; B05D7/04; B05D1/00; B05D1/26; B05D1/265; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/914; B29C48/915; B29C48/9155; B05D2508/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PROCESS WHICH COMPRISES EXTRUDING MOLTEN POLYETHLENE TEREPHTHALATE IN THE FORM OF A THIN FILM ONTO A MOVING SHEET OF ORIENTED, HEAT-SET POLYETHYLENE TEREPHTHALATE FILM; PASSING THE SHEET OF ORIENTED, HEAT-SET POLYETHYLENE TEREPHTHALATE FILM CARRYING THE SUBSTANTIALLY MOLTEN POLYETHYLENE TEREPHTHALATE FILM ONTO A MOVING QUENCHING SURFACE; MAINTAINING CONTACT OF THE ORIENTED, HEAT-SET POLYETHYLENE TEREPHTHALATE FILM WITH THE MOVING QUENCHING SURFACE UNTIL THE SUBSTANTIALLY MOLTEN FILM IS SUFFICIENTLY SOLIDIFIED TO BE SELF-SUPPORTING AND THE PATH OF THE MOLTEN FILM TO THE QUENCHING SURFACE IS ESTABLISHED; AND, THEREAFTER, SEVERING THE ORIENTED, HEAT-SET POLYETHYLENE TEREPHTHALATE FILM AT A POINT PRIOR TO THE POINT OF FIRST CONTACT OF THIS FILM WITH THE MOVING QUENCHING SURFACE, TO PERMIT THE SUBSTANTIALLY MOLTEN POLYETHYLENE TEREPHTHALATE FILM TO BE EXTRUDED DIRECTLY ONTO THE MOVING QUENCHING SURFACE.
Claim 2
Dependent Claim
128 words
A PROCESS WHICH COMPRISES EXTRUDING MOLTEN POLYETHLENE TEREPHTHALATE IN THE FORM OF A THIN FILM ONTO A MOVING SHEET OF ORIENTED, HEAT-SET POLYETHYLENE TEREPHTHALATE FILM; PASSING THE SHEET OF ORIENTED, HEAT-SET POLYETHYLENE TEREPHTHALATE FILM CARRYING THE SUBSTANTIALLY MOLTEN POLYETHYLENE TEREPHTHALATE FILM ONTO A MOVING QUENCHING SURFACE; MAINTAINING CONTACT OF THE ORIENTED, HEAT-SET POLYETHYLENE TEREPHTHALATE FILM WITH THE MOVING QUENCHING SURFACE UNTIL THE SUBSTANTIALLY MOLTEN FILM IS SUFFICIENTLY SOLIDIFIED TO BE SELF-SUPPORTING AND THE PATH OF THE MOLTEN FILM TO THE QUENCHING SURFACE IS ESTABLISHED; AND, THEREAFTER, SEVERING THE ORIENTED, HEAT-SET POLYETHYLENE TEREPHTHALATE FILM AT A POINT PRIOR TO THE POINT OF FIRST CONTACT OF THIS FILM WITH THE MOVING QUENCHING SURFACE, TO PERMIT THE SUBSTANTIALLY MOLTEN POLYETHYLENE TEREPHTHALATE FILM TO BE EXTRUDED DIRECTLY ONTO THE MOVING QUENCHING SURFACE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |