US2293716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal treating solution
Assignee: Parker Rust Proof Co
•
Filing: 1941-02-03
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Granted: 1942-08-25
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Expires: 1961-02-03
Abstract
No abstract record available.
Inventors
- 👤 Van M Darsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:11
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/12; C23C22/14
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) | 1945-08-24 | 1946-02-23 | 1946-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-24 | 1950-02-23 | 1950-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-24 | 1954-02-23 | 1954-08-25 | $7700.00 | Window Closed / Lapsed |