US3663682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary molding method
Assignee: Mitsubishi Chemical Corp
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Filing: 1969-09-08
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Granted: 1972-05-16
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Expires: 1989-09-08
Abstract
Abstract AN IRREGULAR ROTARY MOLD CARRIES EXTERNAL COOLING LIQUID RETAINING DEVICES ALONG PERIPHERAL AREAS WHICH ARE NORMALLY DIFFICULT TO COOL. THE RETAINING DEVICES PERMIT AN UNIFORM COOLING OF THE SYNTHETIC RESIN ARTICLE AFTER MELTING THE RESIN AND FORMING THE ARTICLE.
Inventors
- 👤 Haruo Nitta
- 👤 Naotoshi Sagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:50
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/04; B29C41/00; B29C41/34; B29C41/46
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |