US2904522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of an expanded plastisol composition
Assignee: EIDP Inc
•
Filing: 1954-05-24
•
Granted: 1959-09-15
•
Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Willard E Catlin
- 👤 Mack F Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:09
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0033; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; Y; Y10; Y10S; Y10S273/00; Y10S273/05; Y10S521/00; Y10S521/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR THE PREPARATION OF AN EXPANDED CELLULAR COMPOSITION WHICH INCLUDES THE ESSENTIAL STEPS OF FORMING A PLASTISOL BY MIXING SUITABLE PORTIONS OF A DISPERISON-GRADE POLYVINYL CHLORIDE, A PLASTICIZER, FROM ABOUT 0.5% TO ABOUT 1.5%, BASED ON THE WEIGHT OF THE POLYVINYL CHLORIDE, OF AN ADDITIVE SELECTED FROM THE CLASS CONSISTING OF THE HYDROCARBON OIL-SOLUBLE ALKALI METAL AND ALKALINE EARTH METAL SALTS OF ALKARYL SULFONIC ACIDS, AND N,N''-DINITROSO, N,N''-DIMETHYL TEREPHTHALAMIDE AS A CHEMICAL BLOWING AGENT, HEATING SAID PLASTISOL TO ABOUT THE TEMPERATURE OF DECOMPOSITION OF THE BLOWING AGENT, AND THEREAFTER HEATING SAID PLASTISOL TO A HIGHER TEMPERATURE TO ACCOMPLISH THE GELATION OF THE PLASTISOL AFTER THE BLOWING AGENT HAS DECOMPOSED AND FOAMED SAME.
Claim 2
Dependent Claim
114 words
A PROCESS FOR THE PREPARATION OF AN EXPANDED CELLULAR COMPOSITION WHICH INCLUDES THE ESSENTIAL STEPS OF FORMING A PLASTISOL BY MIXING SUITABLE PORTIONS OF A DISPERISON-GRADE POLYVINYL CHLORIDE, A PLASTICIZER, FROM ABOUT 0.5% TO ABOUT 1.5%, BASED ON THE WEIGHT OF THE POLYVINYL CHLORIDE, OF AN ADDITIVE SELECTED FROM THE CLASS CONSISTING OF THE HYDROCARBON OIL-SOLUBLE ALKALI METAL AND ALKALINE EARTH METAL SALTS OF ALKARYL SULFONIC ACIDS, AND N,N''-DINITROSO, N,N''-DIMETHYL TEREPHTHALAMIDE AS A CHEMICAL BLOWING AGENT, HEATING SAID PLASTISOL TO ABOUT THE TEMPERATURE OF DECOMPOSITION OF THE BLOWING AGENT, AND THEREAFTER HEATING SAID PLASTISOL TO A HIGHER TEMPERATURE TO ACCOMPLISH THE GELATION OF THE PLASTISOL AFTER THE BLOWING AGENT HAS DECOMPOSED AND FOAMED SAME.
References Cited (Backward Citations)
US2732353A
Cited
US2433849A
Cited
US2525966A
Cited
US2609347A
Cited
US2466826A
Cited
US2676928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |