US1382072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for determining the amount of carbon in ferrous metal
Assignee: Individual
•
Filing: 1919-06-16
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Granted: 1921-06-21
•
Expires: 1939-06-16
Abstract
No abstract record available.
Inventors
- 👤 William F Finkl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:48
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/12; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/204998; Y10T436/23
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) | 1924-06-20 | 1924-12-20 | 1925-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-06-20 | 1928-12-20 | 1929-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-06-20 | 1932-12-20 | 1933-06-21 | $7700.00 | Window Closed / Lapsed |