US3375644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fertilizer attachment for rotary lawn mowers
Assignee: ROBERT L HARPER
•
Filing: 1965-05-27
•
Granted: 1968-04-02
•
Expires: 1985-05-27
Abstract
No abstract record available.
Inventors
- 👤 Robert L Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:18
CPC Classifications
A; A01; A01D; A01D43/00; A01D43/14; A01D2101/00; Y; Y10; Y10S; Y10S56/00; Y10S56/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |