US3230647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary digging head
Assignee: Individual
•
Filing: 1963-07-22
•
Granted: 1966-01-25
•
Expires: 1983-07-22
Abstract
No abstract record available.
Inventors
- 👤 Gates Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:50
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/18; E02F3/22; E02F3/24; E02F3/246; E02F3/248
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE573281C
Cited
US2732641A
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US853985A
Cited
US1092632A
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US1581685A
Cited
FR722876A
Cited
DE600965C
Cited
DE697656C
Cited
DE968959C
Cited
US3091874A
Cited
US3043035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |