US2592831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Troughing roll
Assignee: SPURGEON
•
Filing: 1947-12-31
•
Granted: 1952-04-15
•
Expires: 1967-12-31
Abstract
No abstract record available.
Inventors
- 👤 Samuel J Spurgeon
- 👤 Rushton O Kimbro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:26
CPC Classifications
B; B65; B65G; B65G39/00; B65G39/02; B65G39/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US981471A
Cited
US1422662A
Cited
US1499832A
Cited
US1678997A
Cited
US1516083A
Cited
US1618957A
Cited
US2066383A
Cited
US2101017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |