US3512280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction dredging apparatus
Assignee: Individual
•
Filing: 1967-10-13
•
Granted: 1970-05-19
•
Expires: 1987-10-13
Abstract
No abstract record available.
Inventors
- 👤 James Di Perna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:12
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/92; E02F3/9212; E02F3/905; E02F3/9225; E02F3/9237
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US377060A
Cited
US501870A
Cited
US516066A
Cited
US716173A
Cited
US903210A
Cited
US929613A
Cited
US973866A
Cited
US3030080A
Cited
FR1323429A
Cited
US3314174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |