Patent US3511394A successfully refreshed from Google Patents.
US3511394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drainage ditch machine
Assignee: JACK R COX
•
Filing: 1967-09-29
•
Granted: 1970-05-12
•
Expires: 1987-09-29
Abstract
No abstract record available.
Inventors
- 👤 Jack R Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:16
CPC Classifications
E; E02; E02F; E02F7/00; E02F7/02; E02F5/00; E02F5/28; E02F5/285
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US207229A
Cited
US987660A
Cited
US1085035A
Cited
US1164309A
Cited
US1536390A
Cited
US2305044A
Cited
US2395716A
Cited
US2598339A
Cited
US2983362A
Cited
US3139288A
Cited
US3319367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |