US3313873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making molded articles with undercuts
Assignee: Individual
•
Filing: 1965-02-11
•
Granted: 1967-04-11
•
Expires: 1985-02-11
Abstract
No abstract record available.
Inventors
- 👤 Stanley F Dembiak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:19
CPC Classifications
B; B22; B22D; B22D17/00; B22D17/20; B22D17/22; B29; B29C; B29C45/00; B29C45/17; B29C45/40; B29C45/44; F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/22; F16H25/2204; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19721
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A METHOD OF MAKING A TUBULAR MOLDED ARTICLE HAVING AN INTERNAL PERIPHERALLY CONTINUOUS SURFACE FORMED WITH AN UNDERCUT AT ITS INTERNAL SURFACE, TERMINATING SHORT OF THE ENDS OF SAID SURFACE, COMPRISING PLACING IN A MOLD A MASTER OF SAID ARTICLE, AND AN AXIAL PIN SPACEDFROM THE INTERNAL SURFACE OF SAID MASTER, INJECTING INTO THE SPACE IN THE MOLD BETWEEN SAID PIN AND MASTER MOLDING MATERIAL TO FORM AN INSERT HAVING AN EXTERNAL MALE SURFACE CORRESPONDING TO THE INTERNAL FEMALE SURFACE OF SAID MASTER, THEN OPENING THE MOLD, REMOVING THE PIN AND STRIPPING THE INSERT FROM SAID MASTER, THEN COATING SAID MALE SURFACE F THE INSERT WITH A HEAT RESISTING MATERIAL, REPLACING THE INSERT ON SAID PIN, REINSERTING THE PIN WITH THE INSERT THEREON INTO THE MOLD, AND INJECTING HOT MOLDING MATERIAL INTO THE SPACE IN THE MOLD FORMERLY OCCUPIED BY THE MASTER TO MOLD SAID TUBULAR ARTICLE.
Claim 2
Independent Claim
147 words
A METHOD OF MAKING A TUBULAR MOLDED ARTICLE HAVING AN INTERNAL PERIPHERALLY CONTINUOUS SURFACE FORMED WITH AN UNDERCUT AT ITS INTERNAL SURFACE, TERMINATING SHORT OF THE ENDS OF SAID SURFACE, COMPRISING PLACING IN A MOLD A MASTER OF SAID ARTICLE, AND AN AXIAL PIN SPACEDFROM THE INTERNAL SURFACE OF SAID MASTER, INJECTING INTO THE SPACE IN THE MOLD BETWEEN SAID PIN AND MASTER MOLDING MATERIAL TO FORM AN INSERT HAVING AN EXTERNAL MALE SURFACE CORRESPONDING TO THE INTERNAL FEMALE SURFACE OF SAID MASTER, THEN OPENING THE MOLD, REMOVING THE PIN AND STRIPPING THE INSERT FROM SAID MASTER, THEN COATING SAID MALE SURFACE F THE INSERT WITH A HEAT RESISTING MATERIAL, REPLACING THE INSERT ON SAID PIN, REINSERTING THE PIN WITH THE INSERT THEREON INTO THE MOLD, AND INJECTING HOT MOLDING MATERIAL INTO THE SPACE IN THE MOLD FORMERLY OCCUPIED BY THE MASTER TO MOLD SAID TUBULAR ARTICLE.
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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) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |