Patent US3515087A successfully refreshed from Google Patents.
US3515087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planing boat
Assignee: PENN YAN BOATS Inc
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Filing: 1968-09-20
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Granted: 1970-06-02
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Expires: 1988-09-20
Abstract
No abstract record available.
Inventors
- 👤 Robert B Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:53
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/18; B63B39/00; B63B39/06; B63B39/061; B63H; B63H5/00; B63H5/07; B63H5/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |