Patent US2415641A successfully refreshed from Google Patents.
US2415641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wind guard for typewriters
Assignee: Individual
•
Filing: 1945-06-15
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Granted: 1947-02-11
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Expires: 1965-06-15
Abstract
No abstract record available.
Inventors
- 👤 Harold H Langsdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:04
CPC Classifications
B; B41; B41J; B41J29/00; B41J11/00; B41J11/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1541742A
Cited
US1547630A
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US1488453A
Cited
US1604541A
Cited
US1784873A
Cited
GB328353A
Cited
US2010162A
Cited
US2101433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-10 | 1950-08-12 | 1951-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-10 | 1954-08-12 | 1955-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-10 | 1958-08-12 | 1959-02-11 | $7700.00 | Window Closed / Lapsed |