US2819803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boom for cranes
Assignee: Individual
•
Filing: 1954-10-12
•
Granted: 1958-01-14
•
Expires: 1974-10-12
Abstract
No abstract record available.
Inventors
- 👤 Leo B Obenchain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:52
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/64; B66C23/70; B66C23/701; B66C23/703; B66C23/18; B66C23/36; B66C2700/00; B66C2700/03; B66C2700/0321; B66C2700/0357; B66C2700/0364; B66C2700/0371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1345304A
Cited
US1611326A
Cited
US2461433A
Cited
US2605002A
Cited
US2684159A
Cited
US2698096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |