US2318491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crane and shovel boom safety stop
Assignee: Individual
•
Filing: 1942-07-27
•
Granted: 1943-05-04
•
Expires: 1962-07-27
Abstract
No abstract record available.
Inventors
- 👤 Albert A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:14
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/82; B66C23/88; B66C23/92; E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/304; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/20588
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-05-03 | 1946-11-02 | 1947-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-03 | 1950-11-02 | 1951-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-03 | 1954-11-02 | 1955-05-04 | $7700.00 | Window Closed / Lapsed |