Patent US943989A successfully refreshed from Google Patents.
US943989A
Expired / Lapsed
US
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Spiked roller for agricultural purposes.
Assignee: Individual
•
Filing: 1909-03-24
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Granted: 1909-12-21
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Expires: 1929-03-24
Abstract
No abstract record available.
Inventors
- 👤 Robert Nacke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:34
CPC Classifications
A; A01; A01B; A01B33/00; A01B33/02; A01B33/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1912-12-20 | 1913-06-21 | 1913-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-12-20 | 1917-06-21 | 1917-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-12-20 | 1921-06-21 | 1921-12-21 | $7700.00 | Window Closed / Lapsed |