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US2966469A
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Method of curing plasticized polyvinylchloride using radio frequency electrical energy
Assignee: Union Carbide Corp
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Filing: 1955-04-12
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Granted: 1960-12-27
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Expires: 1975-04-12
Abstract
No abstract record available.
Inventors
- 👤 William J Smythe
- 👤 Egon M Muller
- 👤 Robert W Weeden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:51
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; Y; Y10; Y10S; Y10S264/00; Y10S264/60; Y10S521/00; Y10S521/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF CURING PLASTICIZED NON-AQUEOUS POLYVINYL CHLORIDE FOAM WHICH COMPRISES EXPOSING UNGELLED FOAM TO A FIELD OF RADIO FREQUENCY ELECTRICAL ENERGY FOR A TIME PERIOD SUFFICIENT TO GEL AND FUSE THE FOAM WHILE MAINTAINING THE AMBIENT TEMPERATURES SURROUNDING THE FOAM AT APPROXIMATELY THE SAME LEVEL AS THE TEMPERATURE OF THE FOAM, AT LEAST UNTIL THE FOAM REACHES A TEMPERATURE ABOVE GELLING TEMPERATURE, SAID AMBIENT TEMPERATURES BEING INCREASED GRADUALLY AS THE TEMPERATURE OF THE FOAM INCREASES.
Claim 2
Independent Claim
76 words
THE METHOD OF CURING PLASTICIZED NON-AQUEOUS POLYVINYL CHLORIDE FOAM WHICH COMPRISES EXPOSING UNGELLED FOAM TO A FIELD OF RADIO FREQUENCY ELECTRICAL ENERGY FOR A TIME PERIOD SUFFICIENT TO GEL AND FUSE THE FOAM WHILE MAINTAINING THE AMBIENT TEMPERATURES SURROUNDING THE FOAM AT APPROXIMATELY THE SAME LEVEL AS THE TEMPERATURE OF THE FOAM, AT LEAST UNTIL THE FOAM REACHES A TEMPERATURE ABOVE GELLING TEMPERATURE, SAID AMBIENT TEMPERATURES BEING INCREASED GRADUALLY AS THE TEMPERATURE OF THE FOAM INCREASES.
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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) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |