Patent US3137729A successfully refreshed from Google Patents.
US2647331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination crane and bulldozer
Assignee: Koehring Co
•
Filing: 1946-08-19
•
Granted: 1953-08-04
•
Expires: 1966-08-19
Abstract
No abstract record available.
Inventors
- 👤 Ervin A Brugger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:53
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/961
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1233840A
Cited
US1509295A
Cited
US1572228A
Cited
US2239943A
Cited
US2275391A
Cited
US2301808A
Cited
US2404926A
Cited
US2446220A
Cited
US2387764A
Cited
US2502681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |