US3085886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing silicon nitride foam material
Assignee: General Electric Co
•
Filing: 1960-12-14
•
Granted: 1963-04-16
•
Expires: 1980-12-14
Abstract
No abstract record available.
Inventors
- 👤 Max F Grandey
- 👤 Kulp John Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:21
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/591; C04B38/00; C04B38/0022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN A METHOD OF MAKING A SILICON NITRIDE FOAM FROM A MIXTURE COMPRISING SILICON NITRIDE POWDER AND A SILICONE RESIN, THE STEPS OF HEATING THE MIXTURE ABOVE THE DECOMPOSITION TEMPERATURE OF THE SILICONE RESIN IN A NITRIDING ATMOSPHERE TO PRODUCE A BOND BETWEEN THE SILICON NITRIDE POWDER AND THE PRODUCT OF THE SILICONE RESIN DECOMPOSITION.
Claim 2
Dependent Claim
55 words
IN A METHOD OF MAKING A SILICON NITRIDE FOAM FROM A MIXTURE COMPRISING SILICON NITRIDE POWDER AND A SILICONE RESIN, THE STEPS OF HEATING THE MIXTURE ABOVE THE DECOMPOSITION TEMPERATURE OF THE SILICONE RESIN IN A NITRIDING ATMOSPHERE TO PRODUCE A BOND BETWEEN THE SILICON NITRIDE POWDER AND THE PRODUCT OF THE SILICONE RESIN DECOMPOSITION.
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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |