US3038760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fish ladder
Assignee: Individual
•
Filing: 1959-11-06
•
Granted: 1962-06-12
•
Expires: 1979-11-06
Abstract
No abstract record available.
Inventors
- 👤 Donald W Crooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:12
CPC Classifications
E; E02; E02B; E02B8/00; E02B8/08; E02B8/085; A; A01; A01K; A01K79/00; Y; Y02; Y02A; Y02A40/00; Y02A40/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2910833A
Cited
US1232393A
Cited
US1380384A
Cited
US1465269A
Cited
DE373182C
Cited
US1722596A
Cited
US2191424A
Cited
US2683969A
Cited
FR1099520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |