US2597323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crop dusting equipment
Assignee: HILLER HELICOPTERS
•
Filing: 1950-05-01
•
Granted: 1952-05-20
•
Expires: 1970-05-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Stanley Hiller
- 👤 Robert A Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:07
CPC Classifications
A; A01; A01M; A01M9/00; A01M9/0092
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |