US3574646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat resistant materials
Assignee: Bayer Corp
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Filing: 1968-03-20
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Granted: 1971-04-13
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Expires: 1988-03-20
Abstract
Abstract THIS INVENTION RELATES TO NOVEL INORGANIC REFACTORY FOAMS, THEIR PRECURSORS AND METHODS OF MANUFACTURE. THE FOAMS ARE FORMED BY HEATING A FILLER, UNSATURATED POLYESTER FOAM CONTAINING A REFACTORY FILLER, A FLUXING AGENT WHICH IS A COMPOUND OF A METAL OF THE FIRST AND SECOND GROUPS OF THE PERIODIC TABLE AND, IF DESIRED, A HEAT RESISTANT FIBROUS MATERIAL, THEREBY CONSUMING THE POLYESTER BINDER TO PRODUCE THE INORGANIC FOAM. ALTERNATIVELY, THE BINDER MAY BE REDUCED TO A CARBONACEOUS STATE TO PROVIDE AN INSULATIVE MATERIAL USEFUL PER SE AS A PRECUSOR FOR THE INORGANIC FOAMS.
Inventors
- 👤 Marco Wismer
- 👤 Leonard D Rood
- 👤 Joseph F Bosso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:51
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2068; B01D39/2093; C; C04; C04B; C04B38/00; C04B38/06; C04B38/0615; C04B38/062; C04B38/0625; C08; C08J; C08J9/00; C08J9/04
Claims Analysis
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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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |