US3655846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making tubular film
Assignee: Kohjin Holdings Co Ltd
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Filing: 1969-04-28
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Granted: 1972-04-11
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Expires: 1989-04-28
Abstract
Abstract MANUFACTURE OF CONTINUOUS TUBULAR FILMS OF THERMOPLASTIC MATERIALS IN WHICH A MOLTEN TUBULAR FILM OF THERMOPLASTIC MATERIAL IS RAPIDLY COOLED WITH LIQUIDS CONCOMITANTLY ALONG ITS INSIDE AND OUTSIDE SURFACES.
Inventors
- 👤 Teruchika Kanoh
- 👤 Ryota Notomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:43
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/901; B29C48/903; B29C48/03; B29C48/09; B29C48/10; B29C48/902; B29C48/91; B29C48/911; B29C48/9115; B29C48/912; B29C48/919; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92609; B29C2948/92619; B29C48/001; B29C48/0018; B29C48/0019; B29C48/885; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |