US3720397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding structure for casting articles having a negative draft portion
Assignee: Jostens Inc
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Filing: 1971-03-01
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Granted: 1973-03-13
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Expires: 1991-03-01
Abstract
Abstract AN IMPROVED MOLDING STRUCTURE WHICH INCLUDES A MOLDING SURFACE COMPRISED PARTIALLY OF A RIGID MATERIAL AND PARTIALLY OF A FLEXIBLE, RESILIENT MATERIAL, FACILITATING THE MOLDING OF ARTICLES HAVING SURFACES WITH A NEGATIVE DRAFT AND THE REMOVAL OF THE SAME FROM SAID MOLDING STRUCTURE WITHOUT THE DESTRUCTION OR PERMANENT DISTORTION OF EITHER THE ARTICLE MOLDED OR THE MOLDING STRUCTURE WHICH UTILIZES THE DESIRED CHARACTERISTICS OF BOTH A RIGID MATERIAL AND A FLEXIBLE MATERIAL MOLD. D R A W I N G
Inventors
- 👤 L Voegele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:07
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/06; B22C7/00
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |