US2015053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron oxide
Assignee: Nichols Engineering and Research Corp
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Filing: 1932-09-16
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Granted: 1935-09-17
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Expires: 1952-09-16
Abstract
No abstract record available.
Inventors
- 👤 Freeman Horace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:16
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C01; C01G; C01G49/00; C01G49/02; C22B1/14; C01P; C01P2006/00; C01P2006/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-09-16 | 1939-03-18 | 1939-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-09-16 | 1943-03-18 | 1943-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-09-16 | 1947-03-18 | 1947-09-17 | $7700.00 | Window Closed / Lapsed |