US3368358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trenching machine
Assignee: Individual
•
Filing: 1965-07-19
•
Granted: 1968-02-13
•
Expires: 1985-07-19
Abstract
No abstract record available.
Inventors
- 👤 Hartwell A Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:34
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/10; E02F5/104; E02F5/107; E02F5/108; F; F16; F16L; F16L1/00; F16L1/024; F16L1/028; F16L1/036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23963E
Cited
US2693085A
Cited
US2795111A
Cited
US2879649A
Cited
US3004392A
Cited
US3103790A
Cited
US3217499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |