US2736066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for
Assignee: —
•
Filing: —
•
Granted: 1956-02-28
•
Expires: 1973-02-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:26
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/915; B29C48/917; B29C48/03; B29C48/07; B29C48/08; B29C48/914; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN THE PROCESS WHEREIN MOLTEN, THERMOPLASTIC, FILMFORMING, SYNTHETIC, POLYMERIC MATERIAL IS EXTRUDED IN THE FORM OF A THIN FILM ONTO A MOVING QUENCHING SURFACE AND LONGITUDINAL STRETCHING FORCES ARE IMPOSED ON THE FRESHLY EXTRUDED FILM PRIOR TO QUENCHING, THE IMPROVEMENT WHICH COMPRISES DIRECTING A LOCALIZED JET OF INERT GAS AGAINST THE UPPER SURFACE OF THE FILM ADJACENT EACH SIDE EDGE THEREOF ONLY, AT THE POINT WHERE SAID SIDE EDGE OF THE FILM FIRST CONTACTS THE QUENCHING SURFACE, AND WITH SUFFICENT FORCE TO EFFECT FIRM CONTACT BETWEEN THE FILM AND SAID QUENCHING SURFACE, WHEREBY THE EDGES OF THE FILM ARE CAUSED TO FIRMLY ADHERE TO THE QUENCHING SURFACE AT SAID POINT.
Claim 2
Dependent Claim
110 words
IN THE PROCESS WHEREIN MOLTEN, THERMOPLASTIC, FILMFORMING, SYNTHETIC, POLYMERIC MATERIAL IS EXTRUDED IN THE FORM OF A THIN FILM ONTO A MOVING QUENCHING SURFACE AND LONGITUDINAL STRETCHING FORCES ARE IMPOSED ON THE FRESHLY EXTRUDED FILM PRIOR TO QUENCHING, THE IMPROVEMENT WHICH COMPRISES DIRECTING A LOCALIZED JET OF INERT GAS AGAINST THE UPPER SURFACE OF THE FILM ADJACENT EACH SIDE EDGE THEREOF ONLY, AT THE POINT WHERE SAID SIDE EDGE OF THE FILM FIRST CONTACTS THE QUENCHING SURFACE, AND WITH SUFFICENT FORCE TO EFFECT FIRM CONTACT BETWEEN THE FILM AND SAID QUENCHING SURFACE, WHEREBY THE EDGES OF THE FILM ARE CAUSED TO FIRMLY ADHERE TO THE QUENCHING SURFACE AT SAID POINT.
References Cited (Backward Citations)
US2289774A
Cited
US2364435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |