US2839047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weed burner apparatus for tractors
Assignee: SMITH
•
Filing: 1955-03-11
•
Granted: 1958-06-17
•
Expires: 1975-03-11
Abstract
No abstract record available.
Inventors
- 👤 Kenneth R Davisson
- 👤 George R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:49
CPC Classifications
A; A01; A01M; A01M15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1515476A
Cited
US1925164A
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US2531884A
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US2561264A
Cited
US2662783A
Cited
US2685453A
Cited
US2712358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |