US2431986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coloring stainless steel
Assignee: American Rolling Mill Co
•
Filing: 1942-07-22
•
Granted: 1947-12-02
•
Expires: 1962-07-22
Abstract
No abstract record available.
Inventors
- 👤 Clingan Irvine Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:10
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/70; C23C22/72
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |