US2421418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transport blower
Assignee: Individual
•
Filing: 1945-05-01
•
Granted: 1947-06-03
•
Expires: 1965-05-01
Abstract
No abstract record available.
Inventors
- 👤 Darwin A Grossman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:22
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/40; B60P1/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US540105A
Cited
US603077A
Cited
US707992A
Cited
US772606A
Cited
US1455329A
Cited
US1631119A
Cited
US2129252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-02 | 1950-12-02 | 1951-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-02 | 1954-12-02 | 1955-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-02 | 1958-12-02 | 1959-06-03 | $7700.00 | Window Closed / Lapsed |