US2839975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windrow type box
Assignee: Individual
•
Filing: 1954-01-08
•
Granted: 1958-06-24
•
Expires: 1974-01-08
Abstract
No abstract record available.
Inventors
- 👤 Robert M Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:22
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/12; E01C19/15
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA455544A
Cited
US1401149A
Cited
US1488857A
Cited
US1641703A
Cited
US1605094A
Cited
GB251759A
Cited
US1748141A
Cited
US1767243A
Cited
GB333063A
Cited
US1811324A
Cited
US1861925A
Cited
US1892566A
Cited
GB388647A
Cited
US2252690A
Cited
US2209555A
Cited
US2339893A
Cited
US2500064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |