Patent US2691228A successfully refreshed from Google Patents.
US2691228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulldozer blade and scoop mounting
Assignee: Individual
•
Filing: 1952-05-27
•
Granted: 1954-10-12
•
Expires: 1972-05-27
Abstract
No abstract record available.
Inventors
- 👤 Roy F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:32
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/769
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |