Patent US3202745A successfully refreshed from Google Patents.
US3202745A
Expired / Lapsed
US
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Method and apparatus for sinter molding of plastics articles
Assignee: Vasco Ind Corp
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Filing: 1961-10-10
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Granted: 1965-08-24
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Expires: 1981-10-10
Abstract
No abstract record available.
Inventors
- 👤 Ringdal Lars
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:48
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/34; B29C41/36; B29B; B29B13/00; B29B13/007; B29C41/02; B29C41/04; B29C41/06; B29C41/22; B29K; B29K2105/00; B29K2105/25; B29K2105/251; B29L; B29L2031/00; B29L2031/30; B29L2031/3067; Y; Y10; Y10S; Y10S425/00; Y10S425/012
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
THE METHOD OF PRODUCING A SHAPED HOLLOW ARTICLE, WHICH COMPRISES PLACING A CHARGE OF A FINELY DIVIDED THERMOPLASTIC MATERIAL IN A HOLLOW MOLD THE INNER SURFACE OF WHICH HAS THE EXTERNAL CONFIGURATION OF THE ARTICLE TO BE PRODUCED, BY ROTATING AND HEATING SAID MOLD DISTRIBUTING PARTICLES OF SAID MATERIAL OVER AND HEATING THEM FROM SAID MOLD SURFACE UNTIL THE PARTICLES OF SAID CHARGE ARE FUSED TOGETHER INTO A CONTINUOUS FIRST LAYER COVERING SAID SURFACE, THEN, WHILE CONTINUING THE ROTATION AND THE HEATING OF SAID MOLD, DISTRIBUTING THE PARTICLES OF A SECOND CHARGE OF A DIFFERENT FINELY DIVIDED THERMOPLASTIC MATERIAL OVER AND HEATING THEM FROM THE INNER SURFACE OF SAID FIRST LAYER UNTIL THEY ARE FUSED TOGETHER AND TO
Claim 2
Independent Claim
118 words
THE METHOD OF PRODUCING A SHAPED HOLLOW ARTICLE, WHICH COMPRISES PLACING A CHARGE OF A FINELY DIVIDED THERMOPLASTIC MATERIAL IN A HOLLOW MOLD THE INNER SURFACE OF WHICH HAS THE EXTERNAL CONFIGURATION OF THE ARTICLE TO BE PRODUCED, BY ROTATING AND HEATING SAID MOLD DISTRIBUTING PARTICLES OF SAID MATERIAL OVER AND HEATING THEM FROM SAID MOLD SURFACE UNTIL THE PARTICLES OF SAID CHARGE ARE FUSED TOGETHER INTO A CONTINUOUS FIRST LAYER COVERING SAID SURFACE, THEN, WHILE CONTINUING THE ROTATION AND THE HEATING OF SAID MOLD, DISTRIBUTING THE PARTICLES OF A SECOND CHARGE OF A DIFFERENT FINELY DIVIDED THERMOPLASTIC MATERIAL OVER AND HEATING THEM FROM THE INNER SURFACE OF SAID FIRST LAYER UNTIL THEY ARE FUSED TOGETHER AND TO
Claim 3
Dependent Claim
71 words
IN AN APPARATUS FOR FUSION MOLDING OF THERMOPLASTIC PARTICLES, A MOLD, MEANS FOR ROTATING SAID MOLD WHILD THE MOLD IS SUBJECTED TO HEAT, FOR THE DISTRIBUTION AND FUSION IN SAID MOLD OF A FIRST CHARGE OF THERMOPLASTIC PARTICLES PLACED THEREIN, AND MEANS CARRIED BY SAID MOLD FOR DEPOSITION A SECOND CHARGE OF THERMOPLASTIC PARTICLES INTO SAID MOLD AT A PREDETERMINED TIME FOR FUSION WITH THE FUSED FIRST CHARGE IN SAID MOLD.
Claim 4
Dependent Claim
71 words
IN AN APPARATUS FOR FUSION MOLDING OF THERMOPLASTIC PARTICLES, A MOLD, MEANS FOR ROTATING SAID MOLD WHILD THE MOLD IS SUBJECTED TO HEAT, FOR THE DISTRIBUTION AND FUSION IN SAID MOLD OF A FIRST CHARGE OF THERMOPLASTIC PARTICLES PLACED THEREIN, AND MEANS CARRIED BY SAID MOLD FOR DEPOSITION A SECOND CHARGE OF THERMOPLASTIC PARTICLES INTO SAID MOLD AT A PREDETERMINED TIME FOR FUSION WITH THE FUSED FIRST CHARGE IN SAID MOLD.
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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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |