US2924218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irrigating or spraying devices
Assignee: Individual
•
Filing: 1957-04-17
•
Granted: 1960-02-09
•
Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Henry W Walden
- 👤 Richard H Walden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:38
CPC Classifications
A; A61; A61M; A61M29/00; A61M29/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US393580A
Cited
US605682A
Cited
US1732337A
Cited
US1854726A
Cited
DE624117C
Cited
US1943110A
Cited
US2512434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |