US2642339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for oxidizing iron halides to produce iron oxide and chlorine
Assignee: EIDP Inc
•
Filing: 1948-11-06
•
Granted: 1953-06-16
•
Expires: 1968-11-06
Abstract
No abstract record available.
Inventors
- 👤 Roscoe H Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:46
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/01; C01B7/03; C01G; C01G49/00; C01G49/02; C01G49/06; Y; Y10; Y10S; Y10S423/00; Y10S423/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1435928A
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US1984380A
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US1917229A
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GB513947A
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US2367694A
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US2436870A
Cited
US2446221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |