US3766099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of ethylenic resin foam
Assignee: Individual
•
Filing: 1971-12-07
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Granted: 1973-10-16
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Expires: 1991-12-07
Abstract
Abstract A PROCESS OF PRODUCING AN ETHYLENIC RESIN FOAM BY MIXING AND KNEADING AN ETHYLENIC RESIN WITH A VOLATILE ORGANIC FOAMING AGENT UNDER HEATING AND PRESSURE TO FORM A FLOWABLE GEL AND RELASING THE PRESSURE BY EXTRUDING OUT THE GEL, CHARACTERIZED BY THE USE AS SAID FOAMING AGENT OF A MIXTURE COMPRISING (A) DICHLORODIFLUOROMETHANE AND (B) AT LEAST ONE COMPOUND ELECTED FROM MONOCHLOROPENTAFLUOROETHANE AND OCTOFLUOROCYCLOBUTANE. THE FOAMING AGENT MAY ADDITIONALLY CONTAIN ONE OR MORE COMPOUDS SELECTED FROM ALIPHATIC HYDROCARBONS, HAVING A BOILING POINT OF ABOUT 0-70*C. AND CHLOROFLUOROHYDROCARBONS HAVING A BOILING POINT OF 0-70*C.
Inventors
- 👤 I Kawai
- 👤 K Sugiyama
- 👤 A Nishikawa
- 👤 A Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:53
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/149; C08J9/143; C08J9/147; C08J2323/00; C08J2323/02; C08J2323/04; Y; Y10; Y10S; Y10S521/00; Y10S521/908; Y10S521/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |