Patent US3836425A successfully refreshed from Google Patents.
US2593491A
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Water tunnel
Assignee: Individual
•
Filing: 1947-11-26
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Granted: 1952-04-22
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Expires: 1967-11-26
Abstract
No abstract record available.
Inventors
- 👤 Harold E Saunders
- 👤 Charles A Lee
- 👤 Edward A G Marvinney
- 👤 Jr William F Brownell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:29
CPC Classifications
G; G01; G01M; G01M10/00; Y; Y10; Y10S; Y10S285/00; Y10S285/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE323652C
Cited
US1627044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |