US3454106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disk harrow
Assignee: Deere and Co
•
Filing: 1966-09-26
•
Granted: 1969-07-08
•
Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Charles Harold Youngberg
- 👤 Harold Valentine Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:08
CPC Classifications
A; A01; A01B; A01B21/00; A01B21/08; A01B21/083; A01B61/00; A01B61/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1081521A
Cited
US1386132A
Cited
US1941504A
Cited
FR669977A
Cited
US2729929A
Cited
US2974738A
Cited
US2985248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |