US3520790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for preventing marine creatures from sticking
Assignee: JFE Engineering Corp
•
Filing: 1966-08-02
•
Granted: 1970-07-14
•
Expires: 1986-08-02
Abstract
No abstract record available.
Inventors
- 👤 Mutsuro Araki
- 👤 Sotojiro Hamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:28
CPC Classifications
F; F28; F28F; F28F13/00; F28F19/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US392736A
Cited
US843357A
Cited
US1020480A
Cited
US1281108A
Cited
US2762767A
Cited
US2784156A
Cited
GB823531A
Cited
US3010886A
Cited
US3102085A
Cited
US3241512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |