Patent US272834A successfully refreshed from Google Patents.
US3374434A
Expired / Lapsed
US
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Inductive coupling apparatus for use in coupling to underwater electric systems and the like
Assignee: Geodyne Corp
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Filing: 1965-09-09
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Granted: 1968-03-19
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Expires: 1985-09-09
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:28
CPC Classifications
H; H04; H04B; H04B13/00; H04B13/02; H01; H01F; H01F19/00; H01F19/04; H01F19/06; H01F38/00; H01F38/20; H01F38/22; H01F38/28; H01F38/30
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |