US2679200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor blade for rotary cultivators
Assignee: Individual
•
Filing: 1950-11-30
•
Granted: 1954-05-25
•
Expires: 1970-11-30
Abstract
No abstract record available.
Inventors
- 👤 Charles N Johnson
- 👤 Walter H Stephenson
- 👤 John H Nash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:35
CPC Classifications
A; A01; A01B; A01B33/00; A01B33/08; A01B33/10; A01B33/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US503006A
Cited
DE50632C
Cited
US977911A
Cited
US1456860A
Cited
US1532986A
Cited
DE516114C
Cited
US2502094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |