Patent US3056978A successfully refreshed from Google Patents.
US3056978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marker buoy for sunken objects
Assignee: Individual
•
Filing: 1958-11-17
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Granted: 1962-10-09
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Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 Robert R Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:10
CPC Classifications
B; B63; B63B; B63B22/00; B63B22/04; B63B22/08; B63B22/10; B63B2205/00; B63B2205/02; B63B2205/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2418549A
Cited
US2539548A
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US2569977A
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US2752615A
Cited
US2636193A
Cited
US2675568A
Cited
US2820971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |