US3417031A
Expired / Lapsed
US
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Process for the production of iron oxide catalysts
Assignee: Osterreichische Stickstoffwerke AG
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Filing: 1965-10-22
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Granted: 1968-12-17
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Hinrichs Helmut
- 👤 Thoma Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:16
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0411; B; B01; B01J; B01J21/00; B01J23/00; B01J23/70; B01J37/00; B01J37/0009; B01J37/08; B01J37/34; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 0
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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) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |