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Patent US3428448A successfully refreshed from Google Patents.
US3428448A
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US
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Process for reducing metal compounds
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1965-07-20
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Granted: 1969-02-18
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Expires: 1985-07-20
Abstract
No abstract record available.
Inventors
- 👤 Shelton Bank
- 👤 Elliot Vogelfanger
- 👤 Lars A Naslund
- 👤 David J C Yates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:57
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/44; C22B5/00; C22B5/02; C22B5/04; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2177412A
Cited
US2787540A
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US2716057A
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US3102808A
Cited
US3336133A
Cited
US3265634A
Cited
US3330815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |