US3016576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing expanded cellular materials
Assignee: EIDP Inc
•
Filing: 1957-12-31
•
Granted: 1962-01-16
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Expires: 1977-12-31
Abstract
No abstract record available.
Inventors
- 👤 Richard M Dowaing
- 👤 Richard E Mortberg
- 👤 William J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:48
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; Y; Y10; Y10S; Y10S264/00; Y10S264/60; Y10S264/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR PREPARING EXPANDED CELLULAR RESINOUS MATERIALS WHICH COMPRISES FORMING A LIQUID PLASTISOL WITH A RESIN, A SUITABLE PLASTICIZER, AND A CHEMICAL BLOWING AGENT, HEATING A CONTINUOUSLY FLOWING THIN FILM OF SAID FLUID PLASTISOL TO A TEMPERATURE IM THE THRESHOLD TEMPERATURE RANGE OF SUBSTANTIAL THERMAL DECOMPOSITION OF THE BLOWING AGENT, IMMEDIATELY DISCHARGING SAID HEATED PLASTISOL INTO A MOLD WHEREIN DECOMPOSITION OF THE CHEMICAL BLOWING AGENT OCCURS TO RELEASE A GAS AND FOAM THE PLASTISOL, AND THEREAFTER HEATING THE FOAMED PLATISOL FURTHER TO FLUX THE RESIN WITH THE PLASTICIZER.
Claim 2
Dependent Claim
89 words
A PROCESS FOR PREPARING EXPANDED CELLULAR RESINOUS MATERIALS WHICH COMPRISES FORMING A LIQUID PLASTISOL WITH A RESIN, A SUITABLE PLASTICIZER, AND A CHEMICAL BLOWING AGENT, HEATING A CONTINUOUSLY FLOWING THIN FILM OF SAID FLUID PLASTISOL TO A TEMPERATURE IM THE THRESHOLD TEMPERATURE RANGE OF SUBSTANTIAL THERMAL DECOMPOSITION OF THE BLOWING AGENT, IMMEDIATELY DISCHARGING SAID HEATED PLASTISOL INTO A MOLD WHEREIN DECOMPOSITION OF THE CHEMICAL BLOWING AGENT OCCURS TO RELEASE A GAS AND FOAM THE PLASTISOL, AND THEREAFTER HEATING THE FOAMED PLATISOL FURTHER TO FLUX THE RESIN WITH THE PLASTICIZER.
References Cited (Backward Citations)
GB500298A
Cited
US2353362A
Cited
US2528506A
Cited
US2663908A
Cited
US2717418A
Cited
US2829117A
Cited
US2889291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |