US3703572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a mold and casting shallow articles therein
Assignee: Plastetics Inc
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Filing: 1969-11-14
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Granted: 1972-11-21
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Expires: 1989-11-14
Abstract
Abstract A THIN MOLD IS FORMED FROM A PATTERN OUT OF A THIN SHEET OF THERMOPLASTIC SYNTHETIC RESIN, PREFERABLY A THERMOPLASTIC ELASTOMER. SINCE THIS MOLD IS TOO THIN TO BE USED FOR CASTING, IT IS BACKED WITH A CAST MATERIAL SO THAT THE MOLD COMPRISES A THIN SHEET OF ELASTOMER AND A REMOVABLE CAST BACKING. AFTER THE ARTICLE IS CAST IN THIS MOLD, THE BACKING IS REMOVED. THIS ENABLES THE THIN MOLD TO BE READILY AND EXPEDITIOUSLY REMOVED FROM THE CAST ARTICLE WITHOUT EITHER DAMAGING THE ARTICLE OF THE MOLD.
Inventors
- 👤 Gerald J Bellasalma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/0011; B29C33/0016; B29C33/38; B29C33/3842; B29C33/3857; B29C33/44; B29C33/48; B29C33/50; B29C33/56; B29C33/68; Y; Y10; Y10S; Y10S264/00; Y10S264/13
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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |