US2190050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating metallic articles
Assignee: Solvay Process Co
•
Filing: 1938-04-22
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Granted: 1940-02-13
•
Expires: 1958-04-22
Abstract
No abstract record available.
Inventors
- 👤 Lyndon S Tracy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:44
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/23; B23K31/00; B23K31/02; B23K31/025; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/327
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) | 1943-02-12 | 1943-08-14 | 1944-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-12 | 1947-08-14 | 1948-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-12 | 1951-08-14 | 1952-02-13 | $7700.00 | Window Closed / Lapsed |