US2806255A
Expired / Lapsed
US
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Process of making an expanded cellular product
Assignee: Individual
•
Filing: 1954-05-05
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Granted: 1957-09-17
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Expires: 1974-05-05
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Dietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:10
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/08; C08J2325/10; Y; Y10; Y10S; Y10S264/00; Y10S264/83
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
A CONTINOUS PROCESS FOR MAKING A RIGID, CELLULAR PRODUCT WHICH INCLUDES, PROVIDING A RESINOUS MIXTURE COMPRISING A FINELY DIVIDED COPOLYMER OF STYRENE AND BUTADIENE AND FROM 0.5 TO 10% BY WEIGHT OF DINITROSOPENTAMETHYLENETETRAMINE, FLUXING SAID MIXTURE BY CONFINED WORKING UNDER PRESSURE TO PRODUCE INTERNAL HEAT SUFFICIENT TO RELEASE THE NITROGEN FROM THE DINITROSOPENTAMETHYLENETETRAMINE, AND SUBSTANTIALLY SIMULTANEOUS WITH THE RELEASE OF NITROGEN FROM THE BLOWING AQGENT PROGRESSIVELY DISCHARGING AND EXPANDING THE THUS HEATED MIXTURE INTO A CELLULAR STRUCTURE AS IT IS THUS RELEASED FROM CONFINEMENT.
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) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |