US3732349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for simultaneously shearing and quenching polymer films
Assignee: TEL LABOR Inc
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Filing: 1971-01-07
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Granted: 1973-05-08
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Expires: 1991-01-07
Abstract
Abstract A PROCESS IS DESCRIBED FOR PRODUCING POLYMER FILMS WITH IMPROVED MECHANICAL PROPERTIES USING SUBSTANTIALLY CRYSTALLINE POLYMERS. THIS IS ACHIEVED BY EXPOSED MOLTEN POLYMER SIMULTANEOUSLY TO HIGH SHEARING AND QUENCHING RATES BY CONTACTING THE MOLTEN POLYMER WITH A DRY METALLIC SURFACE WHICH PRESSES AGAINST THE MOLTEN POLYMER. THIS PROCESS ALSO INCREASES THE TRANSPARENCY OF THE POLYMER FILM.
Inventors
- 👤 H Chen
- 👤 T Kwei
- 👤 T Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:11
CPC Classifications
B; B29; B29C; B29C55/00; B29C48/00; B29C48/001; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/10
Claims Analysis
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |