US2424741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: JOHN BRELAND WHIGAM
•
Filing: 1944-09-26
•
Granted: 1947-07-29
•
Expires: 1964-09-26
Abstract
No abstract record available.
Inventors
- 👤 Edward J Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:52
CPC Classifications
B; B60; B60S; B60S9/00; B60S9/02; B60S9/10; B60S9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1583189A
Cited
US1836962A
Cited
US1995241A
Cited
US2233732A
Cited
US2237167A
Cited
US2343937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |