Patent US3764550A successfully refreshed from Google Patents.
US3764550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the formation of metal carbide and metal carbide plus carbon microspheres
Assignee: WR Grace and Co Conn
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Filing: 1969-06-09
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Granted: 1973-10-09
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Expires: 1989-06-09
Abstract
Abstract A process for preparing metal carbide and metal carbide plus carbon microspheres by controlled decomposition of ion exchange resin beads that contain metals followed by conversion to the metal carbide or metal carbide plus carbon.
Inventors
- 👤 J Block
- 👤 R Shoup
- 👤 N Raymond
- 👤 L Triggiani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:59
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2006/00; C01P2006/10; C01P2006/80
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
18 words
The process according to claim 1 wherein the carbonaceous microspheres are exchanged with an aqueous hafnyl chloride solution.
Claim 2
Dependent Claim
18 words
The process according to claim 1 wherein the carbonaceous microspheres are exchanged with an aqueous uranyl nitrate solution.
Claim 3
Dependent Claim
18 words
The process according to claim 1 wherein the carbonaceous microspheres are exchanged with an aqueous titanium chloride solution.
Claim 4
Dependent Claim
21 words
The process according to claim 1 wherein the carbonaceous microspheres are anion exchange resins and are exchanged with aqueous tungstate solutions.
Claim 5
Dependent Claim
17 words
The process according to claim 1 wherein the solvent used to prepare the metal solution is methanol.
Claim 6
Dependent Claim
16 words
The process according to claim 1 wherein the metal carbide microspheres contain an excess of carbon.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |