Patent US2668152A successfully refreshed from Google Patents.
US2668152A
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Method of producing cellular materials and compositions therefor
Assignee: Sherwin Williams Co
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Filing: 1951-03-27
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Granted: 1954-02-02
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Expires: 1971-03-27
Abstract
No abstract record available.
Inventors
- 👤 Grady M O'neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:00
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08L; C08L21/00; Y; Y10; Y10S; Y10S521/00; Y10S521/909; Y10S521/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF PRODUCING CELLULAR PRODUCTS WHICH COMPRISES INCORPORATING INTO A MILLABLE POLYMER WHICH IS PLASTIC AT TEMPERATURES WITHIN THE RANGE OF 266 DEGREES F. TO 350 DEGREES F. A HEAT DECOMPOSABLE, GAS PRODUCING COMPOSITION CONTAINING BIURET IN SUFFICIENT QUANTITIES TO ACT AS A BLOWING AGENT TO FORM CELLULAR PRODUCTS SUBSTANTIALY FREE FROM COLLAPSING OF THE CELLS THEREIN, AND HEATING THE RESULTANT MATERIAL TO TEMPERATURES AT WHICH THE BIURET DECOMPOSES TO PRODUCE AMMONIA AND EXPAND SAID MATERIAL, AND SETTING THE RESULTANT EXPANDED CELLULAR MATERIAL.
Claim 2
Independent Claim
84 words
A METHOD OF PRODUCING CELLULAR PRODUCTS WHICH COMPRISES INCORPORATING INTO A MILLABLE POLYMER WHICH IS PLASTIC AT TEMPERATURES WITHIN THE RANGE OF 266 DEGREES F. TO 350 DEGREES F. A HEAT DECOMPOSABLE, GAS PRODUCING COMPOSITION CONTAINING BIURET IN SUFFICIENT QUANTITIES TO ACT AS A BLOWING AGENT TO FORM CELLULAR PRODUCTS SUBSTANTIALY FREE FROM COLLAPSING OF THE CELLS THEREIN, AND HEATING THE RESULTANT MATERIAL TO TEMPERATURES AT WHICH THE BIURET DECOMPOSES TO PRODUCE AMMONIA AND EXPAND SAID MATERIAL, AND SETTING THE RESULTANT EXPANDED CELLULAR MATERIAL.
References Cited (Backward Citations)
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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) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |