US3516182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-levelling irrigation ditcher machine
Assignee: JEFFIE I WYKERT
•
Filing: 1967-12-06
•
Granted: 1970-06-23
•
Expires: 1987-12-06
Abstract
No abstract record available.
Inventors
- 👤 Jeffie I Wykert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:31
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/14; E02F5/145; E02F3/00; E02F3/04; E02F3/18; E02F3/181; E02F3/20; Y; Y10; Y10S; Y10S37/00; Y10S37/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US354136A
Cited
US2621427A
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US2684254A
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US2755721A
Cited
US2872200A
Cited
US2844882A
Cited
US3044194A
Cited
US3156989A
Cited
US3346976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |