US3475160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing reducing gases for the fluidized bed reduction of ores
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1967-02-15
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Granted: 1969-10-28
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Expires: 1987-02-15
Abstract
No abstract record available.
Inventors
- 👤 Fred J Heinzelmann
- 👤 Arthur L Saxton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:18
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0073; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C21B13/0033; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122; Y02P10/134; Y02P10/143; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1645968A
Cited
US2379423A
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US2585737A
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US2971752A
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US3379505A
Cited
US3375099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |