Patent US3625647A successfully refreshed from Google Patents.
US3625647A
Expired / Lapsed
US
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Method of preparing calcium-nickel phosphate catalyst
Assignee: Dow Chemical Co
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Filing: 1968-03-25
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Granted: 1971-12-07
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Expires: 1988-03-25
Abstract
Abstract CALCIUM-NICKEL PHOSPHATE CATALYST IS PREPARED BY REACTING A CALCIUM HYDROXIDE SOLUTION OR SLURRY WITH A SOLUTION CONTAINING PHOSPHORIC ACID AND A NICKEL COMPOUND. THE PH IS MAINTAINED AT 7-9.
Inventors
- 👤 Robert A Stowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:27
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/45; B; B01; B01J; B01J27/00; B01J27/14; B01J27/185; B01J27/1853; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333
Claims Analysis
Total Claims: 0
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |