US2519910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derrick
Assignee: Individual
•
Filing: 1946-09-23
•
Granted: 1950-08-22
•
Expires: 1966-09-23
Abstract
No abstract record available.
Inventors
- 👤 Kershaw Royce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:46
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/72; B66C23/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US152703A
Cited
US337462A
Cited
US733128A
Cited
US771846A
Cited
US1529069A
Cited
US1860774A
Cited
US2375264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |