Patent US2840936A successfully refreshed from Google Patents.
US2840936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush rake attachment for bulldozers
Assignee: Individual
•
Filing: 1955-08-24
•
Granted: 1958-07-01
•
Expires: 1975-08-24
Abstract
No abstract record available.
Inventors
- 👤 Rand Eilert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:23
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/8152
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1543222A
Cited
US1741933A
Cited
US1744139A
Cited
US2634520A
Cited
US2632261A
Cited
US2763073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |