US3567807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming and carbonizing a composite article of inorganic particles bonded with foamed phenol formaldehyde resin
Assignee: Owens Corning
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Filing: 1967-05-19
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Granted: 1971-03-02
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Expires: 1987-05-19
Abstract
Abstract A METHOD OF FORMING HEAT INSULATION MATERIAL COMPRISING PRESSING INORGANIC PARTICLES WHICH ARE SURROUNDED WITH A FOAMABLE PHENOL-FORMALDEHYDE RESIN INTO GENERALLY ABUTTING CONTACT, FOAMING THE RESIN; HEATING IN AN OXIDIZING ATMOSPHERE OF AIR TO A NONKINDLING TEMPERATURE BETWEEN APPROXIMATELY 400*F. AND APPROXIMATELY 600*F. FOR A SUFFICIENT PERIOD OF TIME TO CARBONIZE AT LEAST PART OF THE FOAM.
Inventors
- 👤 Richard F Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:45
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/58; B29C70/66; C; C04; C04B; C04B26/00; C04B26/02; C04B26/10; C04B26/12; C04B26/122; C04B35/00; C04B35/515; C04B35/52; C04B35/524; C08; C08J; C08J9/00; C08J9/35; B29K; B29K2105/00; B29K2105/06; B29K2105/16; B29K2105/165; B29K2709/00; B29K2709/02; B29K2709/08; B29K2995/00; B29K2995/0012; B29K2995/0015
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |