US3448874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile crane with spaced pivotally mounted booms
Assignee: Koehring Co
•
Filing: 1967-07-03
•
Granted: 1969-06-10
•
Expires: 1987-07-03
Abstract
No abstract record available.
Inventors
- 👤 Edwin O Martinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:48
CPC Classifications
B; B66; B66C; B66C23/00; B66C2700/00; B66C2700/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
SU181253A1
Cited
FR1025407A
Cited
US2996206A
Cited
US2773614A
Cited
US2995263A
Cited
US2941678A
Cited
US3233759A
Cited
US3174630A
Cited
US3251496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |