Patent US3553132A successfully refreshed from Google Patents.
US3553132A
Expired / Lapsed
US
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Heat and flame resistant pyrolyzed cellular material and process of making same
Assignee: Celanese Corp
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Filing: 1968-02-26
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Granted: 1971-01-05
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Expires: 1988-02-26
Abstract
Abstract A SOLID ORGANIC FOAM HAVING AN INORGANIC COMPOUND, SUCH AS BORIC OXIDE OR ANTIMONY OXIDE, SUBSTANTIALLY UNIFORMLY DISTRIBUTED THEREIN IS SUBJECTED TO A PYROLYSIS TREATMENT TO PRODUCE A CARBONIZED HEAT RESISTANT MATERIAL WHICH FINDS UTILITY IN INSULATING AND OTHER SIMILAR APPLICATIONS. THE RESULTING PRODUCT RETAINS THE ORIGINAL CELLULAR STRUCTURE OF THE SOLID ORGANIC FOAM, EXHIBITS ENHANCED RESILIENCY AT ELEVATED TEMPERATURES, AND IS INCAPABLE OF BURNING OR EVOLVING SMOKE OR POISONOUS GASES WHEN SUBJECTED TO AN INTENSE FLAME OR HEAT. THE PRODUCT OF THE INVENTION ACCORDINGLY LACKS THE "TOTAL FIRE HAZARD" COMMONLY EXHIBITED BY ORGANIC FOAM MATERIALS.
Inventors
- 👤 Michael Dunay
- 👤 Saunders E Jamison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:43
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B38/00; C04B38/0022; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |