US3499290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating boom
Assignee: Individual
•
Filing: 1968-06-24
•
Granted: 1970-03-10
•
Expires: 1988-06-24
Abstract
No abstract record available.
Inventors
- 👤 Millard F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:51
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/08; E02B15/0814; E02B15/0857; E02B15/0885; E02B3/00; E02B3/04; E02B3/06; E02B3/062; Y; Y02; Y02A; Y02A10/00; Y02A10/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US877201A
Cited
US978897A
Cited
US1646168A
Cited
US1973719A
Cited
US2106564A
Cited
US2240567A
Cited
US3184923A
Cited
FR1305469A
Cited
US3321923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |