Patent US2821989A successfully refreshed from Google Patents.
US2821989A
Expired / Lapsed
US
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Convertible top for boats
Assignee: Individual
•
Filing: 1956-09-10
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Granted: 1958-02-04
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Expires: 1976-09-10
Abstract
No abstract record available.
Inventors
- 👤 Shepard Harwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:11
CPC Classifications
B; B63; B63B; B63B17/00; B63B17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US778330A
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US835378A
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US1028266A
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US1533448A
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US2266853A
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US2505520A
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US2681659A
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US2639751A
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US2689579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |