US2540803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Log carrier
Assignee: Individual
•
Filing: 1949-02-15
•
Granted: 1951-02-06
•
Expires: 1969-02-15
Abstract
No abstract record available.
Inventors
- 👤 Alexander Ronald Rouleau
- 👤 William P O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:23
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/40; B60P3/41
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2240564A
Cited
US2276127A
Cited
US2321198A
Cited
US2361181A
Cited
US2404898A
Cited
US2454675A
Cited
US2472557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |