Patent US5459781A successfully refreshed from Google Patents.
Patent US2564587A successfully refreshed from Google Patents.
US2564587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Watercraft
Assignee: Individual
•
Filing: 1948-07-21
•
Granted: 1951-08-14
•
Expires: 1968-07-21
Abstract
No abstract record available.
Inventors
- 👤 Sundstedt Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:08
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)
US1327543A
Cited
GB189819007A
Cited
US1025399A
Cited
US1686264A
Cited
US1748252A
Cited
US1802861A
Cited
US1928317A
Cited
US2271065A
Cited
US2320574A
Cited
US2361556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |