Defensive publication
Abstract
Abstract BIAXIALLY ORIENTED POLYESTER FILM HAVING A PATTERN EMBOSSED ON ONE SURFACE THEREOF IS PRODUCED BY EXTRUDING THE FILM, ORIENTING THE FILM BY STRETCHING AT LEAST 2.5 TIMES IN TWO MUTUALLY PERPENDICULAR DIRECTIONS IN THE PLANE OF THE FILM, EMBOSSING ONE SURFACE OF THE FILM PRIOR TO COMPLETION OF HEAT SETTING, AND HEAT SETTING THE BIAXIALLY ORIENTED FILM. THE FILM IS EMBOSSED BY CONTACTING THE SURFACE OF THE FILM AFTER BIAXIAL ORIENTATION AND PRIOR TO COMPLETION OF HEAT SETTING WITH A METAL ROLL HAVING A SURFACE ROUGHNESS OF ABOUT FROM 25 TO 80 MICROINCHES, A.A., A TEMPERATURE OF ABOUT FROM 175* TO 220*C., AND A PRESSURE OF ABOUT FROM 40 TO 80 LBS. PER LINEAL INCH. THE METAL ROLL ALONG WITH A RUBBER ROLL FORMS A NIP THROUGH WHICH THE FILM IS PASSED TO EFFECT THE EMBOSSMENT.
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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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |