US2149253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating metal surfaces to inhibit corrosion
Assignee: Individual
•
Filing: 1937-05-19
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Granted: 1939-03-07
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Expires: 1957-05-19
Abstract
No abstract record available.
Inventors
- 👤 Harry A Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:02
CPC Classifications
C; C21; C21D; C21D7/00; C21D7/02; C21D7/04; C21D7/06; B; B24; B24C; B24C11/00; C23; C23C; C23C24/00; C23C24/02; C23C24/04; Y; Y10; Y10T; Y10T29/00; Y10T29/47
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) | 1942-03-06 | 1942-09-05 | 1943-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-06 | 1946-09-05 | 1947-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-06 | 1950-09-05 | 1951-03-07 | $7700.00 | Window Closed / Lapsed |