US2538736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer
Assignee: Individual
•
Filing: 1944-10-23
•
Granted: 1951-01-16
•
Expires: 1964-10-23
Abstract
No abstract record available.
Inventors
- 👤 Effie P Spencer
- 👤 The National Bank And Company
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/32; B60P3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189614657A
Cited
GB152611A
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GB275829A
Cited
GB271388A
Cited
US1964894A
Cited
US1852984A
Cited
US2055930A
Cited
GB461624A
Cited
US2148270A
Cited
US2188545A
Cited
US2193352A
Cited
US2292107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |