US2797505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ditcher attachment for bulldozer moldboards
Assignee: Individual
•
Filing: 1954-04-14
•
Granted: 1957-07-02
•
Expires: 1974-04-14
Abstract
No abstract record available.
Inventors
- 👤 Edgar A Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:38
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/8152
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US296333A
Cited
US1137693A
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US1877768A
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US2297677A
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US2562318A
Cited
US2536308A
Cited
US2497351A
Cited
US9041234B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |