US2489166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quenching machine
Assignee: American Steel Foundries
•
Filing: 1943-03-25
•
Granted: 1949-11-22
•
Expires: 1963-03-25
Abstract
No abstract record available.
Inventors
- 👤 Frank M Timm
- 👤 Robert D Gibney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:33
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/62; C21D1/63; C21D1/64
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US643278A
Cited
US950885A
Cited
US1256482A
Cited
US1276106A
Cited
US1614069A
Cited
US1730918A
Cited
US1856734A
Cited
US1858431A
Cited
US2061864A
Cited
US2096105A
Cited
US2305811A
Cited
US2228684A
Cited
US2262811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |