US3139470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing oriented, organic, thermoplastic polymeric film
Assignee: EIDP Inc
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Filing: 1963-05-03
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Granted: 1964-06-30
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Expires: 1983-05-03
Abstract
No abstract record available.
Inventors
- 👤 Prengle Robert Smith
- 👤 Jr Robert Laurence Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:36
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B29; B29C; B29C55/00; B29C55/02; B29C55/10; B29C55/12; B29C55/14; B29C55/143; B29K; B29K2027/00; B29K2027/12; B29K2027/14; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS FOR PREPARING AN ORIENTED POLYVINYL FLUORIDE FILM WHICH COMPRISES CONTINUOUSLY STRETCHING IN TWO MUTUALLY PERPENDICULAR DIRECTIONS, AT LEAST 50% BUT NOT MORE THAN 500% IN EITHER DIRECTION, A LATENT SOLVENTCONTAINING FILM OF A POLYVINYL FLUORIDE HAVING AN INHERENT VISCOSITY OF AT LEAST 0.5, SAID FILM CONTAINING, PRIOR TO TRANSVERSE STRETCHING, AT LEAST 26% BY WEIGHT OF A LATENT SOLVENT FOR POLYVINYL FLUORIDE, BASED ON THE TOTAL WEIGHT OF THE FILM; EVOLVING LATENT SOLVENT THEREFROM DURING TRANSVERSE STRETCHING UNTIL THE AMOUNT OF LATENT SOLVENT REMAINING IN THE FILM AFTER TRANSVERSE STRETCHING CONSTITUTES BETWEEN 9% AND 17% BY WEIGHT, BASED ON THE TOTAL WEIGHT; AND, THEREAFTER, DRYING SAID FILM TO REMOVE SUBSTANTIALLY ALL OF THE LATENT SOLVENT THEREFROM.
Claim 2
Dependent Claim
118 words
A PROCESS FOR PREPARING AN ORIENTED POLYVINYL FLUORIDE FILM WHICH COMPRISES CONTINUOUSLY STRETCHING IN TWO MUTUALLY PERPENDICULAR DIRECTIONS, AT LEAST 50% BUT NOT MORE THAN 500% IN EITHER DIRECTION, A LATENT SOLVENTCONTAINING FILM OF A POLYVINYL FLUORIDE HAVING AN INHERENT VISCOSITY OF AT LEAST 0.5, SAID FILM CONTAINING, PRIOR TO TRANSVERSE STRETCHING, AT LEAST 26% BY WEIGHT OF A LATENT SOLVENT FOR POLYVINYL FLUORIDE, BASED ON THE TOTAL WEIGHT OF THE FILM; EVOLVING LATENT SOLVENT THEREFROM DURING TRANSVERSE STRETCHING UNTIL THE AMOUNT OF LATENT SOLVENT REMAINING IN THE FILM AFTER TRANSVERSE STRETCHING CONSTITUTES BETWEEN 9% AND 17% BY WEIGHT, BASED ON THE TOTAL WEIGHT; AND, THEREAFTER, DRYING SAID FILM TO REMOVE SUBSTANTIALLY ALL OF THE LATENT SOLVENT THEREFROM.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |