US3419404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partially nitrided aluminum refractory material
Assignee: 3M Co
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Filing: 1964-06-26
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Granted: 1968-12-31
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Expires: 1984-06-26
Abstract
No abstract record available.
Inventors
- 👤 George W Mao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:52
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0047; C22C32/0068; B; B22; B22F; B22F1/00; B22F1/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A REFRACTORY COMPOSITE MATERIAL COMPRISING A MASS OF PARTIALLY NITRIDED FINE ALUMINUM FLAKES, SAID FLAKES HAVING ALUMINUM CORES AND ALUMINUM NITRIDE SHELLS, AND FIBER-LIKE APPENDAGES EXTENDING FROM SEAID FLAKES AND BEING JOINED TO AND ENTWINED WITH THE APPENDAGES OF ADJACENT PARTICLES TO INTERLOCK THE PARTICLES INTO AN INTEGRAL MASS.
References Cited (Backward Citations)
US2929126A
Cited
US3108887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |