US3007204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for biaxially stretching polymeric films
Assignee: Bayer AG
•
Filing: 1958-12-17
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Granted: 1961-11-07
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Expires: 1978-12-17
Abstract
No abstract record available.
Inventors
- 👤 Veiel Ulrich
- 👤 Prietzschk Artur
- 👤 Schnell Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:18
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/04; B29C55/06; B29C67/00; B29C67/0011; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
PROCESS FOR THE PRODUCTION OF LONGITUDINALLY AND TRANSVERSELY STRETCHED BODIES OF FILMS, FOILS AND STRIPS, MADE FROM HIGHLY POLYMERIC, THERMOPLASTIC, CRYSTALLIZABLE PLASTIC MATERIALS, WHICH COMPRISES DRAWING SAID BODIES TRANSVERSELY OVER AN EDGE HAVING A SMALL RADIUS OF CURVATURE WITH THE ENTIRE WIDTH OF THE BODIES CONTACTING SAID EDGE, AND HEATING SAID EDGE TO A TEMPERATURE BELOW THE SOFTENING POINT OF SAID MATERIAL OF SAID BODIES, THE DRAWING FORCE BEING SUFFICIENT FOR STRETCHING THE BODEIS BOTH LONGITUDINALLY AND TRANSVERSELY.
Claim 2
Dependent Claim
78 words
PROCESS FOR THE PRODUCTION OF LONGITUDINALLY AND TRANSVERSELY STRETCHED BODIES OF FILMS, FOILS AND STRIPS, MADE FROM HIGHLY POLYMERIC, THERMOPLASTIC, CRYSTALLIZABLE PLASTIC MATERIALS, WHICH COMPRISES DRAWING SAID BODIES TRANSVERSELY OVER AN EDGE HAVING A SMALL RADIUS OF CURVATURE WITH THE ENTIRE WIDTH OF THE BODIES CONTACTING SAID EDGE, AND HEATING SAID EDGE TO A TEMPERATURE BELOW THE SOFTENING POINT OF SAID MATERIAL OF SAID BODIES, THE DRAWING FORCE BEING SUFFICIENT FOR STRETCHING THE BODEIS BOTH LONGITUDINALLY AND TRANSVERSELY.
References Cited (Backward Citations)
GB558297A
Cited
US2771635A
Cited
US2659931A
Cited
GB722756A
Cited
US2804652A
Cited
US2917779A
Cited
US2925641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |