US2145864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making hardened surface articles
Assignee: Ohio Crankshaft Co
•
Filing: 1934-07-12
•
Granted: 1939-02-07
•
Expires: 1954-07-12
Abstract
No abstract record available.
Inventors
- 👤 Francis S Denneen
- 👤 William C Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/58; F16C33/64; F16C9/00; F16C9/04; H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/38; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49703; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2162
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-02-06 | 1942-08-08 | 1943-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-06 | 1946-08-08 | 1947-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-06 | 1950-08-08 | 1951-02-07 | $7700.00 | Window Closed / Lapsed |