US3570052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film treatment
Assignee: Imperial Chemical Industries Ltd
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Filing: 1967-03-31
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Granted: 1971-03-16
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Expires: 1987-03-31
Abstract
Abstract HEAT-TREATING ORIENTED FILM BY FEEDING IT TO AT LEAST ONE MATT SURFACED ROTATING ROLL WHIH IS MAINTAINED AT A TEMPERATURE AT WHICH THE FILM WILL SHRINK BUT BELOW THE MELTING POINT OF THE FILM AND FORCING THE FILM AGAINST THE ROLL WHILE UNIFORMLY SPREADING IT OUT ON THE ROLL.
Inventors
- 👤 Grahame Melvin Reade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:38
CPC Classifications
B; B29; B29C; B29C61/00; B29C61/06; B29C53/00; B29C53/16; B29C53/18
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |