Patent US3469231A successfully refreshed from Google Patents.
US3469231A
Expired / Lapsed
US
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Underwater locating and intercommunicating device,particularly for free-swimming divers
Assignee: Individual
•
Filing: 1967-07-20
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Granted: 1969-09-23
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Expires: 1987-07-20
Abstract
No abstract record available.
Inventors
- 👤 Hermann Geiling
- 👤 Paul Weberling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:18
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/80; G01S3/802; G01S3/805; G01S3/8055; B; B63; B63C; B63C11/00; B63C11/02; B63C11/26; G01S1/00; G01S1/72; G01S1/725; H; H04; H04B; H04B1/00; H04B1/02; H04B1/03; H04B1/034; Y; Y10; Y10S; Y10S367/00; Y10S367/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |