Patent US2525965A successfully refreshed from Google Patents.
US2525965A
Expired / Lapsed
US
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Molding method
Assignee: Uniroyal Inc
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Filing: 1948-01-30
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Granted: 1950-10-17
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Expires: 1968-01-30
Abstract
No abstract record available.
Inventors
- 👤 Omar H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:17
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; B; B29; B29C; B29C44/00; B29C44/02; B29C44/10; B29C33/00; B29C33/10; B29C37/00; B29C37/005; B29K; B29K2027/00; B29K2027/06; Y; Y10; Y10S; Y10S261/00; Y10S261/72; Y10S264/00; Y10S264/60; Y10S264/64; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
THE PROCESS OF MAKING A CLOSED-CELL GASEXPANDED THERMOPLASTIC RESIN ARTICLE WHICH COMPRISES SUBSTANTIALLY COMPLETELY FILLING A MOLD CAVITY FORMED BY A SECTIONAL MOLD WITH AN EXPANSIBLE RESIN MIXTURE COMPRISING A PLASTISOL OF PARTICLES OF A THERMOPLASTIC RESIN AND A PLASTICIZER THEREFOR AND ALSO CONTAINING A BLOWING AGENT, COMPLETELY CLOSING SAID MOLD, HEATING THE MIXTURE IN THE CLOSED MOLD SUFFICIENTLY TO INITIATE GENERATION OF GAS FROM THE BLOWING AGENT, APPLYING A LIMITED MOLD-CLOSING PRESSURE TO THE MOLD DURING THE INITIAL PORTION OF SAID HEATING STEP, SAID PRESSSURE BEING SO LIMITED THAT THE PRESSURE OF THE GENERATED GAS IN THE MIXTURE ACTS TO SEPARATE THE MOLD SECTIONS SUFFICIENTLY TO PERMIT A SMALL AMOUNT OF THE MIXTURE TO ESCAPE BY SEEPAGE FROM THE MOLD, THEREAFTER INCREASING THE MOLD-CLOSING PRESSURE SUFFICIENTLY TO STOP SEEPAGE AND PREVENT FURTHER SEEPAGE FROM THE MOLD WHILE CONTINUING SAID HEATING TO COMPLETE GENERATION OF GAS FROM THE BLOWING AGENT, COOLING AND REMOVING THE SHAPED ARTICLE FROM THE MOLD, AND EXPANDING IT TO FINA CLOSED-CELL-GAS-EXPANDED FORM BY HEATING IT OUTSIDE THE MOLD.
Claim 2
Dependent Claim
172 words
THE PROCESS OF MAKING A CLOSED-CELL GASEXPANDED THERMOPLASTIC RESIN ARTICLE WHICH COMPRISES SUBSTANTIALLY COMPLETELY FILLING A MOLD CAVITY FORMED BY A SECTIONAL MOLD WITH AN EXPANSIBLE RESIN MIXTURE COMPRISING A PLASTISOL OF PARTICLES OF A THERMOPLASTIC RESIN AND A PLASTICIZER THEREFOR AND ALSO CONTAINING A BLOWING AGENT, COMPLETELY CLOSING SAID MOLD, HEATING THE MIXTURE IN THE CLOSED MOLD SUFFICIENTLY TO INITIATE GENERATION OF GAS FROM THE BLOWING AGENT, APPLYING A LIMITED MOLD-CLOSING PRESSURE TO THE MOLD DURING THE INITIAL PORTION OF SAID HEATING STEP, SAID PRESSSURE BEING SO LIMITED THAT THE PRESSURE OF THE GENERATED GAS IN THE MIXTURE ACTS TO SEPARATE THE MOLD SECTIONS SUFFICIENTLY TO PERMIT A SMALL AMOUNT OF THE MIXTURE TO ESCAPE BY SEEPAGE FROM THE MOLD, THEREAFTER INCREASING THE MOLD-CLOSING PRESSURE SUFFICIENTLY TO STOP SEEPAGE AND PREVENT FURTHER SEEPAGE FROM THE MOLD WHILE CONTINUING SAID HEATING TO COMPLETE GENERATION OF GAS FROM THE BLOWING AGENT, COOLING AND REMOVING THE SHAPED ARTICLE FROM THE MOLD, AND EXPANDING IT TO FINA CLOSED-CELL-GAS-EXPANDED FORM BY HEATING IT OUTSIDE 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) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |