Patent US2513857A successfully refreshed from Google Patents.
US2513857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic surfboard
Assignee: Individual
•
Filing: 1946-02-05
•
Granted: 1950-07-04
•
Expires: 1966-02-05
Abstract
No abstract record available.
Inventors
- 👤 Conrad W Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:56
CPC Classifications
B; B63; B63B; B63B32/00; B63B32/50; B63B32/51
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1206696A
Cited
US1262989A
Cited
US1402529A
Cited
US1864648A
Cited
US2018548A
Cited
US2216871A
Cited
US2389729A
Cited
US2355757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |