US3067711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catamaran boat hull construction
Assignee: DUO MARINE Inc
•
Filing: 1960-06-22
•
Granted: 1962-12-11
•
Expires: 1980-06-22
Abstract
No abstract record available.
Inventors
- 👤 Neil R Hesher
- 👤 Victor B Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:14
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/18; B63B1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US450350A
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US1312036A
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US1658080A
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US1712758A
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GB297802A
Cited
US2020792A
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US2249958A
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US2422818A
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US2483663A
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US2989939A
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US2995104A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |