US3634578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for molding a hollow article
Assignee: Individual
•
Filing: 1969-09-30
•
Granted: 1972-01-11
•
Expires: 1989-09-30
Abstract
Abstract METHOD OF FORMING A HOLLOW ARTICLE WHEREIN A PERFORATED CORE CONTAINING THERMOPLASTIC RESIN POWDER IS PLACED WITHIN A MOLD CAVITY WHICH IS HEATED TO EFFECT MELTING OF THE RESIN WHICH FLOWS INTO THE CLEARANCE BETWEEN THE CORE AND CAVITY.
Inventors
- 👤 Tadao Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:16
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/04; B29C41/06; B29C33/00; B29C33/12; B29C33/123; B29C33/126; B29C41/20; B29C70/00; B29C70/68; B29C70/70; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2105/00; B29K2105/25; B29K2105/251; B29K2705/00; B29L; B29L2022/00; B29L2031/00; B29L2031/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |