US3347971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotational molding
Assignee: Uniroyal Inc
•
Filing: 1963-06-17
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Granted: 1967-10-17
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Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Mankowich Ivan
- 👤 Andrew D Varenelli
- 👤 Alfred J Heinrichs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:08
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/04; B29C41/06; B29K; B29K2027/00; B29K2027/06; B29K2105/00; B29K2105/25; B29K2105/251
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A METHOD OF MAKING HOLLOW ARTICLES OF PLASTICIZED THERMOPLASTIC RESIN COMPRISING, DEPOSITING IN A MOLD A FLUENT MEASURED CHARGE OF FRAGMENTS OF A FLUXED COMPOUND OF A THERMOPLASTIC RESIN OF WHICH VINYL CHLORIDE IS AT LEAST 50% BY WEIGHT OF THE MONOMER SYSTEM AND A PLASTICIZER THEREFOR, SAID CHARGE BEING LESS IN VOLUME THAN THE VOLUME OF SAID MOLD, SAID FRAGMENTS HAVING A MAXIMUM VOLUMETRIC SIZE OF LESS THAN .125 IN.3 BUT NOT LESS THAN ABOUT /000244 IN.3, ROTATING THE MOLD IN A PLURALITY OF PLANES WHILE HEATING THE FRAGMENTS TO DISTRIBUTE THE COMPOUND, AND COALESCE THE FRAGMENTS INTO A LAYER OVER THE SURFACE OF THE MOLD IN THE FORM OF THE OBJECT TO BE MOLDED, COOLING THE COMPOUND IN THE LAYER BENEATH THE MELTING TEMPERATURE THEREOF, AND REMOVING THE ARTICLE FROM THE MOLD.
Claim 2
Independent Claim
134 words
A METHOD OF MAKING HOLLOW ARTICLES OF PLASTICIZED THERMOPLASTIC RESIN COMPRISING, DEPOSITING IN A MOLD A FLUENT MEASURED CHARGE OF FRAGMENTS OF A FLUXED COMPOUND OF A THERMOPLASTIC RESIN OF WHICH VINYL CHLORIDE IS AT LEAST 50% BY WEIGHT OF THE MONOMER SYSTEM AND A PLASTICIZER THEREFOR, SAID CHARGE BEING LESS IN VOLUME THAN THE VOLUME OF SAID MOLD, SAID FRAGMENTS HAVING A MAXIMUM VOLUMETRIC SIZE OF LESS THAN .125 IN.3 BUT NOT LESS THAN ABOUT /000244 IN.3, ROTATING THE MOLD IN A PLURALITY OF PLANES WHILE HEATING THE FRAGMENTS TO DISTRIBUTE THE COMPOUND, AND COALESCE THE FRAGMENTS INTO A LAYER OVER THE SURFACE OF THE MOLD IN THE FORM OF THE OBJECT TO BE MOLDED, COOLING THE COMPOUND IN THE LAYER BENEATH THE MELTING TEMPERATURE THEREOF, AND REMOVING THE ARTICLE FROM THE MOLD.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |