US2687598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tree poison injecting tool
Assignee: Individual
•
Filing: 1949-12-07
•
Granted: 1954-08-31
•
Expires: 1969-12-07
Abstract
No abstract record available.
Inventors
- 👤 Robert L Calhoun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:17
CPC Classifications
A; A01; A01M; A01M21/00; A01M21/04; A01M21/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1372228A
Cited
FR548059A
Cited
US1661595A
Cited
FR708127A
Cited
US2116591A
Cited
US2309391A
Cited
US2323773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |