Patent US2525966A successfully refreshed from Google Patents.
US2525966A
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Treatment of expanded articles
Assignee: Uniroyal Inc
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Filing: 1948-05-19
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Granted: 1950-10-17
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Expires: 1968-05-19
Abstract
No abstract record available.
Inventors
- 👤 Omar H Smith
- 👤 Paul G Roach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:51
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; Y; Y10; Y10S; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A METHOD OF MAKING CLOSED-CELL EXPANDED PLASTICIZED POLYVINYL CHLORIDE ARTICLES WHEREIN A MOLD IS SUBSTANTIALLY FILLED WITH A MIXTURE COMPRISING PARTICULATE POLYVINYL CHLORIDE AND A PLASTICIZER THEREFOR OF SUCH A TYPE AND IN SUCH AMOUNT AS TO CONVERT SAID POLYVINYL CHLORIDE TO A GEL UPON HEATING, AND A BLOWING AGENT, SAID MIXTURE IS PREHEATED IN THE MOLD TO EFFECT GENERATION OF GAS BY THE BLOWING AGENT AND FORMATION OF SAID GEL, AND THE MOLDED ARTICLE IS SUBSEQUENTLY HEATED OUTSIDE THE MOLD TO EXPAND IT, THE IMPROVEMENT
Claim 2
Dependent Claim
87 words
IN A METHOD OF MAKING CLOSED-CELL EXPANDED PLASTICIZED POLYVINYL CHLORIDE ARTICLES WHEREIN A MOLD IS SUBSTANTIALLY FILLED WITH A MIXTURE COMPRISING PARTICULATE POLYVINYL CHLORIDE AND A PLASTICIZER THEREFOR OF SUCH A TYPE AND IN SUCH AMOUNT AS TO CONVERT SAID POLYVINYL CHLORIDE TO A GEL UPON HEATING, AND A BLOWING AGENT, SAID MIXTURE IS PREHEATED IN THE MOLD TO EFFECT GENERATION OF GAS BY THE BLOWING AGENT AND FORMATION OF SAID GEL, AND THE MOLDED ARTICLE IS SUBSEQUENTLY HEATED OUTSIDE THE MOLD TO EXPAND IT, THE IMPROVEMENT
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 |