USRE27771E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for quenching extruded polymeric film
Assignee: —
•
Filing: 1971-11-11
•
Granted: 1973-10-02
•
Expires: 1991-11-11
Abstract
Abstract THIS INVENTION RELATES TO THE PREPARATION OF ORGANIC THERMOPLASTIC POLYMERS IN THE FORM OF THIN FILMS. MORE PARTICULARLY, THE INVENTION RELATES TO THE PREPARATION OF MELT EXTRUDED POLYMERIC FILMS UTILIZING AN ELECTROSTATIC CHARGE TO CAUSE THE EXTRUDED FILM TO ADHERE FIRMLY TO A QUENCHING SURFACE IN THE PROCESS.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:31
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/915; B29C48/9165; B29C48/03; B29C48/07; B29C48/08; B29C48/914
Claims Analysis
Total Claims: 0
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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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |