Patent US3671621A successfully refreshed from Google Patents.
US3671621A
Expired / Lapsed
US
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Injection molding method for sandals
Assignee: Individual
•
Filing: 1970-07-01
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Granted: 1972-06-20
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Expires: 1990-07-01
Abstract
Abstract The method according to the present invention comprises injecting the first resinous material into the first cavity of a movable mold, cooling the material into a cured condition, shifting the movable mold with the cured first material up to the second stational mold, injecting the second resinous material into the second cavity, cooling the second material into a cured condition and finally releasing the articles from the mold.
Inventors
- 👤 Tatsuo Fukuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:59
CPC Classifications
B; B29; B29D; B29D35/00; B29D35/02; B29D35/04; B29D35/06; B29D35/08; B29D35/081; B29D35/082
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |