US2493816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat structure
Assignee: Individual
•
Filing: 1946-06-03
•
Granted: 1950-01-10
•
Expires: 1966-06-03
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Hardman
- 👤 Charles H Boxmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:10
CPC Classifications
B; B63; B63B; B63B5/00; B63B5/02; B63B5/06; B63B3/00; B63B3/14; B63B3/26; B63B3/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191013608A
Cited
US1687387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |