US2690848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillating beam type crawler-tractor appliance
Assignee: Frank G Hough Co
•
Filing: 1947-01-18
•
Granted: 1954-10-05
•
Expires: 1967-01-18
Abstract
No abstract record available.
Inventors
- 👤 Ralph L Beyerstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:34
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1356679A
Cited
US1673307A
Cited
US1785119A
Cited
US1676688A
Cited
US1986285A
Cited
US2063035A
Cited
US2126289A
Cited
US2073823A
Cited
US2269775A
Cited
US2377495A
Cited
US2363341A
Cited
US2427968A
Cited
US2469158A
Cited
US2538000A
Cited
US2519974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |