US3421329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillating ground engaging instrument
Assignee: Henkels and McCoy Inc
•
Filing: 1965-10-24
•
Granted: 1969-01-14
•
Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Frank R Kinnan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:39
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/10; E02F5/102; E02F5/103
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2704613A
Cited
US2702502A
Cited
US2905253A
Cited
US3140745A
Cited
US3065557A
Cited
US3170300A
Cited
US3113390A
Cited
US3201944A
Cited
US3222876A
Cited
US3232358A
Cited
US3293778A
Cited
US3326009A
Cited
US3286534A
Cited
US3339641A
Cited
US3326010A
Cited
US3307363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |