US2850216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented gate for spreader box
Assignee: Individual
•
Filing: 1954-02-19
•
Granted: 1958-09-02
•
Expires: 1974-02-19
Abstract
No abstract record available.
Inventors
- 👤 Lawrence D Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:40
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/12; E01C19/20; E01C19/2005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1848750A
Cited
US1838631A
Cited
US2005896A
Cited
US1982773A
Cited
GB428298A
Cited
US2560732A
Cited
FR985817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |