Patent US2669785A successfully refreshed from Google Patents.
US2669785A
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US
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Sounding device for locating shallows and holes in a lake bottom
Assignee: Individual
•
Filing: 1948-08-09
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Granted: 1954-02-23
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Expires: 1968-08-09
Abstract
No abstract record available.
Inventors
- 👤 George S Rydzewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:35
CPC Classifications
G; G01; G01C; G01C13/00; G01C13/008; A; A01; A01K; A01K91/00; A01K91/20; B; B63; B63B; B63B43/00; B63B43/18; B63B43/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US486782A
Cited
US555489A
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US751623A
Cited
GB189724347A
Cited
GB190104809A
Cited
GB191516316A
Cited
US1398853A
Cited
FR581258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |