US2860488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fish migration apparatus for high dams
Assignee: Individual
•
Filing: 1953-02-11
•
Granted: 1958-11-18
•
Expires: 1973-02-11
Abstract
No abstract record available.
Inventors
- 👤 Donald L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:01
CPC Classifications
A; A01; A01K; A01K61/00; A01K61/10; A01K79/00; A01K79/02; E; E02; E02B; E02B8/00; E02B8/08; E02B8/085; Y; Y02; Y02A; Y02A40/00; Y02A40/60; Y02A40/80; Y02A40/81
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1524667A
Cited
US1573785A
Cited
GB319833A
Cited
US1903627A
Cited
US2125311A
Cited
US2171560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |