US3630718A
Expired / Lapsed
US
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NONPYROPHORIC METAL POWDER OF A METAL FROM THE GROUP IVb, Vb AND VIb OR THE ACTINIUM SERIES OF THE PERIODIC TABLE
Assignee: H.C. Starck GmbH
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Filing: 1969-03-20
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Granted: 1971-12-28
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Expires: 1989-03-20
Abstract
Abstract A nonpyrophoric metal powder of Group IVb, Group Vb, Group VIb or the actinium series of the Periodic Table, having a particle size of 0.03 to 0.1 micron and a low surface area to volume ratio.
Inventors
- 👤 Ernst Neuenschwander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:21
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/20; B22F9/22; H; H01; H01J; H01J37/00; H01J37/32
Claims Analysis
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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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |