Patent EP0115139A2 successfully refreshed from Google Patents.
US3529047A
Expired / Lapsed
US
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Method for continuous manufacture of corrugated plastic pipes
Assignee: Furukawa Electric Co Ltd
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Filing: 1967-03-20
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Granted: 1970-09-15
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Expires: 1987-03-20
Abstract
No abstract record available.
Inventors
- 👤 Tsunemi Yoshida
- 👤 Koichi Ishikawa
- 👤 Masatoshi Ando
- 👤 Yoshihiko Ueno
- 👤 Kunio Arisawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:43
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/0015; B29C48/00; B29C48/03; B29C48/13; B29C48/25; B29C48/30; B29C48/32; B29C48/33; F; F16; F16L; F16L11/00; F16L11/04; F16L11/11; F16L11/111; H; H01; H01B; H01B13/00; H01B13/06; H01B13/14; B29C48/09; B29C48/16; B29C48/18; B29C48/21; B29C48/335; B29C48/34; B29L; B29L2023/00; B29L2023/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |