US3532780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a tubular film or tubes of thermoplastic resin
Assignee: Asahi Kasei Corp
•
Filing: 1967-09-08
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Granted: 1970-10-06
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Expires: 1987-09-08
Abstract
No abstract record available.
Inventors
- 👤 Tsutomu Kakutani
- 👤 Yosimichi Akimoto
- 👤 Masao Ueno
- 👤 Nobumasa Hirai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:05
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/901; B29C48/903; B29C48/03; B29C48/09; B29C48/10; B29C48/885; B29C48/911; B29C48/9115; B29C48/912; B29C48/9135
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2461975A
Cited
US2708772A
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US2814071A
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US3144494A
Cited
US3320637A
Cited
US3346920A
Cited
US3377413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |