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US3475772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain attachment for flexible cover for boats
Assignee: Individual
•
Filing: 1968-02-13
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Granted: 1969-11-04
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Expires: 1988-02-13
Abstract
No abstract record available.
Inventors
- 👤 Albert Lokken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:19
CPC Classifications
B; B63; B63B; B63B17/00; B63B17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE26363E
Cited
US2441009A
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US2500531A
Cited
US2697619A
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US2763960A
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US3184764A
Cited
US3401958A
Cited
US3394671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |