US2968987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring depths of water and detecting submerged bodies byemploying pulsed light
Assignee: Individual
•
Filing: 1949-06-01
•
Granted: 1961-01-24
•
Expires: 1969-06-01
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Knopow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:48
CPC Classifications
G; G01; G01S; G01S17/00; G01S17/02; G01S17/06; G01S17/08; G01S17/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1982271A
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US2237193A
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US2250333A
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US2409030A
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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) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |